Will 2 lens of different focal lengths on the same f/number have different aperture diameters?

Will 2 lens of different focal lengths on the same f/number have different aperture diameters?

Read more: Will 2 lens of different focal lengths on the same f/number have different aperture diameters?

Accuvue contact lens irritating my eyes?

I started using lens 1 1/2 years ago of Bausch And Lomb. Really comfortable and I loved it. But I read this review on the internet that Accuvue lens ae vert soothing and soft for your eyes and I bought 6 pairs of them for 6 months (monthly disposable). Starting using them 2 days ago. It was hard to put them in my eyes first but once I did, ever since then I'm feeling like there's something in the corners of my eyes and its irritating me. First I thought my eyes are adapting to new lenses but its the 3rd day and I'm feeling the same. Should I go back to Bausch And Lomb or what? I also have spectacles just in case I wear them at night and not the whole day cuz I love lens so much. Help please I don't wanna stop wearng lenses!

Read more: Accuvue contact lens irritating my eyes?

I'm never happy when I'm on Vacation?

Ok, so here is the story. I'm not boring. Whenever we go out on a vacation with my husband, I would love to go out and have fun but in the evening after 6-7PM, I get this feeling to return to the hotel room. This happened to me when I went to disney world. My husband was pretty pissed off because of that. I feel very cold. I feel uneasy. Now, I'm here on this vacation and my husband was telling me to roam around in car. I was like.no. I don't wana put contact lenses, I just wana stay in room. Then he said me to sit in balcony.so, I sat down in balcony. Then he said to play some music, I did play but I turned volume down. He asked, what happened. I said there must be neighbours in the floor below. I wasn't sure if they were there. I'm always cautious that I don't bug anybody or that nobody complaints about us. Also, that I hate loud noises. He was so mad at me that I ruin every holiday of his. He spoiled all of the evening. Is there my fault? I hate loud noises, I feel cold in the evenings. I just wana sit and relax in a holiday. I wake up at 5am, go to work, come back at 5pm, go to kitchen to cook full meal for my husband. I get tired. I even don't like vacations. I just wana sleep and sleep. I wake up early in hotel rooms with a fear that housekeeping would knock soon to clean our room. My husband said that I'm depressing. He said that I say no to everything. Should I see a doctor?

Read more: I'm never happy when I'm on Vacation?

Cloudy/greasy contact lens?

I wear Acuvue Advance Plus and have worn these for about a year. They are two-week lenses.

Over the past few months, I've been having trouble. It seems like one side (it varies at different times, too) "gets something on the contact" somehow after a few days and it is this whitish film looking stuff that appears as if it is greasy when I attempt to scrub it clean with my fingers, using solution. Then I get it clean… I put it in and within a small amount of time (usually hours), it's like it gets dirty again and has the haze/white film on it. I've tried changing contacts when that happened (this wasn't back to back… The old were taken out on the previous night and the new ones were put in the new morning). Still the same issue. I see nothing that my eyes are emitting apart from the normal small amount of "sleepy" that gets in the corners (not on the contacts themselves). This white film/haze is almost always a circular-like ring that is right in the middle of the contact.

I've worn contacts almost always, since around 2004 or 2005. On a day or two each week, I leave them out to give my eyes some rest. I never wear them to bed. They go in during the morning and out every night by about midnight. They soak in multipurpose solution overnight.

Added (1). When I take them out of my eye at night, I do wash them with water briefly, to get any gunk off from them after scrubbing them lightly with my finger. Then I soak them in the multipurpose solution overnight. Before I put them in in the morning, I lightly scrub them with solution, wash them with water briefly (because using solution to wash stuff off from them doesn't seem to work that well), then I rinse them again with the solution before putting them in my eyes.

Added (2). I should also note that about 6 months ago, I started a new job within my company. I work in the meat/seafood departments of a grocery store in interchangeable positions several nights per week. We spray a deli detergent that does say "eye irritant" on it, but I don't get anything in my eyes that I am aware of. We also use some sanitizing stuff for the pans and utensils and such that we use. However, even on other days when I'm not in those areas, I get this white film.

Added (3). This white film/fog of sorts seems to be directly in the middle… Sometimes it is actually in a circular pattern around what I presume is the corner (?) pattern in the middle of the contact. So for some reason, it seems to get trapped there and/or originate from there for some reason. When I wear my glasses, I have no issues. There doesn't appear to be any type of infection or anything in my eyes. No stye, bumps or eye injuries that I know of.

Added (4). Hmm… Typo correction: "This white film/fog of sorts seems to be directly in the middle… Sometimes it is actually in a circular pattern around what I presume is the CORNEA (?) pattern in the middle of the contact"

Read more: Cloudy/greasy contact lens?

Best contact lens for dry eyes?

I have dry eyes and my current contacts, acuvue oasis feels weird on my eyes and gets dry in a few hours. I've tried dailies and they were even worse for my eyes. I've did research and heard that coopervision is good. Anyone have experience with coopervision?

Read more: Best contact lens for dry eyes?

Lenses off for glasses?

Hi,

I just had my eyes checked, and it turns out I needed prescription lenses for astigmatism & farsightedness… Now finally after two weeks after trying to find damn transportation back to walmart, I noticed my far off vision was better but now at night I notice the starbursts around lights haven't improved by much.

I can't afford to buy new lenses, and I'll probably just throw them away may as well have burned the money on fire guess that's what I get for using wallmart. Will my eyes adjust and solve this double vision and starbursts I see around lights? Or what… I'll try it for two weeks, if not I'll just throw them away.

Read more: Lenses off for glasses?

About how much would it cost for me to get contacts?

I have glasses and I paid $66 for each lens. Would it be the same for regular contact lenses? Or would it cost more?

Read more: About how much would it cost for me to get contacts?

Can I wear these contacts if I have brown eyes?

I want to buy these green ones, but they say "if you have Green eyes." Can I still wear them if my eyes are Brown? http://www.optykrozmus.com/contact-lens-types/colored-contact-lenses/freshlook-dimensions-sea-green-contact-lenses-6-lenses_.asp

Read more: Can I wear these contacts if I have brown eyes?

My eyes get very tired from looking at computer screens. What could this mean?

I already wear glasses and contact lenses.

It's only in my left eye though. I often get a pulsating sensation in my left eye.

I also see letters backwards or upside down with just looking through my left eye.

Read more: My eyes get very tired from looking at computer screens. What could this mean?

Why do my eyes swell the morning after swimming?

After swimming/steam room my eyes are fine until I wake the next morning, my eyelids are really swollen and red. I always remove contact lenses before swimming etc. How can I stop/ help this? Thanks

Read more: Why do my eyes swell the morning after swimming?

How to make my eye color brighter WITHOUT make-up?

Heya,
I was wandering if anyone could give me a few pointers on how I can brighten up my eye color without using make-up. Im a guy, just incase your wandering…14 years old. I have blue eyes but they arent really as blue as I'd like them to be. If I could get some pointers it would be a good help!

Read more: How to make my eye color brighter WITHOUT make-up?

Do contact lenses worsen your eye sight over time?

I got contacts like 2 years ago and before I got contacts, I was able to see the board at school if I squint, but now I can't even do that whenever I'm not wearing them.

Read more: Do contact lenses worsen your eye sight over time?

A near sighted person has a far point that is 323 cm from her eye?

A near sighted person has a far point that is 323 cm from her eye. If this person wears glasses 2.00 cm in front of the eyes with a focal length of -321 cm, distant objects can be brought into focus.
Suppose a second person's eyeglasses have a focal length of -301 cm, are 2.00 cm in front of the eyes, and allow the person to focus on distant objects.
A) Is the second person's far point greater than or less than 323 cm? Why?
B) Find the far point for this person.

Read more: A near sighted person has a far point that is 323 cm from her eye?

Someone accused me of sucking in my tummy in a picture and I wasn't?

A guy asked for a picture of me, and I sent it. Then he made some comment about how I look chubby and I'm obviously sucking in my stomach anyway. I am a size 16, so yeah I may be chubby, but I was not sucking in my stomach. I just have really big boobs compared to my waist, bigger than average (DD size). I've recently lost about 25 pounds, and I know my body and the way I gained weight - my stomach got a lot flatter while my boobs stayed close to the same size. Assuming that I lose weight in the same way that I gained it in the first place, the boobs won't start to go until I get down to a size 12.

But now I feel embarrassed because someone accused me of sucking in my tummy, even when I didn't. What should I do?

Added (1). Is there a certain way that someone looks if they're sucking in their stomach? I don't want everyone to think I'm that insecure that I would do that. I was wearing pretty powerful Spanx in the pic, but not sucking in my stomach.

Read more: Someone accused me of sucking in my tummy in a picture and I wasn't?

Where can I buy some cheap contact lenses?

I need some coloured contact lenses (preferably blue) not prescriptive. Just normal

Read more: Where can I buy some cheap contact lenses?

Eye exam at walmart how do they do it there?

i have an eye appointment at walmart tomorrow and i haven't had an eye exam in three years yea i know thats pretty bad i was just wondering how the did the exam as in do they have a machine like lens crafters or if i have to read the letters on the chart because if it's the chart i'll probably be guessing the letters because my eye is way off from my last prescription

Read more: Eye exam at walmart how do they do it there?

Dowa the millitary allow ortho k eye treatment?

Hello my son is wearing ortho k contact lenses at night and takes them off at the day to get perfect vision. I'm just wondering if the millitary allows that?

Read more: Dowa the millitary allow ortho k eye treatment?

Specsavers can I keep same frames but different lenses?

Iv had these glasses for a few months and don't want to pay for a new pair, and I think my eyes have changed.

Can they put the new lenses in the frame I have now?

Read more: Specsavers can I keep same frames but different lenses?

Air Force Loadmaster Vison at MEPS?

Before I head to MEPS should I get a eye exam to see if I'm able to be corrected to 20/20 or do they do that at MEPS? Thanks. I already asked this question but didn't really get the answer I needed thanks.

Read more: Air Force Loadmaster Vison at MEPS?

I want colored contacts?!

I want some colored contacts but I'm not sure how they would look on me because I'm African American and I want my eyes to go good with my skin tone. I have a medium skin tone I'm not dark or light. I want either grey, hazel, or green contacts. Which one do you think would go best with my skintone.

Read more: I want colored contacts?!

How to look pretty without standing out too much?

So, I am 14 and a goth and I want to stay this way. I accept who I am or rather, what I want to be. I am just sick of people looking at me and speaking about me behind my back and calling me fake. I just have to wear make-up. I am not naturally pretty at all. I have a big nose, spotty skin, small eyes and I am a bit chubby. I usually over exaggerate my eyes in order for them to look bigger, I would get circle lenses but it is hard to get them in the UK, I also wear a lot of foundation in order to cover up the dark circles under my eyes, spots and any other flaws. I wear subtle lipstick/lipgloss so I do not think it is a big problem. I also wear expensive gothic dresses whenever I go out because I rarely go out and when I am at school I wear school uniform. So, how do I make my goth and big eye looks more subtle?

Read more: How to look pretty without standing out too much?

Buying contact lenses?

Hi there,

I currently pay £20 a month for my contact lenses from an optician.
I saw on a few websites that they sell contact lenses

http://www.getlenses.co.uk/

Without an optician, is it possible to arrange a contact lens appointment for a fee, and buy my own lenses privately?

I hope you know what I mean?

Many thanks

Read more: Buying contact lenses?

My eyes hurt when i use the computer?

i have to sit really far away from the screen because my eyes will hurt and its annoying i am near sighted cuz i cant see far away my precription is like -3 in both eyes i think. I think i neeed bifocal lens idk but im tired of thsi eye pains

Added (1). im 17

Read more: My eyes hurt when i use the computer?

GREEN contacts for brown eyes?

Okay, I have medium brown/hazel eyes. I don't dislike them, I own regular contacts that I wear often but sometimes I like to switch it up and wear colored contacts as well. I really enjoy green contacts. I have tried freshlooks in regular green and gemstone green. The regular green doesn't really show up and the gemstone green was too "reptile" looking if you know what I mean. I have tried a few lenses from pinkyparadise.com, I LOVE the puffy 3 tone greens but they're 14.5 mm, that's just a little too big for me. I love how solotica and waicon lenses look but they're rather expensive. What's a good green contact lens that's cheap but will still give me a beautiful light green color over my brown eyes? Thanks!

Read more: GREEN contacts for brown eyes?

Best thing for itchy eyes (hayfever)?

My hayfever seems to worsen every year and this year its started a month or so early.
I can cope with the sneezing, runny nose, itchy nostrils etc but I'm finding it hard to deal with the itchy eyes. I rubbed my eyes so much thing morning they went all bloodshoot. It also means I either can't wear eye makeup or I look like a panda!

I know that rubbing them can make it worse but I literally cant stop myself.

I've only tried clarityn tablets so far which have taken the edge off slightly but not done much.
I haven't tried eye drops yet because I wear contact lenses (continuous wear) and there are not many drops Ive found that you can use with lenses.

Can anyway recommend anything tablets or otherwise (in the UK please) that have helped combat this as its getting unbearable. Thank you!

Read more: Best thing for itchy eyes (hayfever)?

Can I sleep with my contact lenses in? - 1

I have a pair of contact lenses that are good for 14 days. I've had them for about 10 days and I am staying the night somewhere and I forgot my solution and case. Can I wear the lenses in overnight this one night?

Read more: Can I sleep with my contact lenses in? - 1

If we slower the light rray, can we see past?

If light is travelling in air and we have put on diamond lenses(refractive index 2.42) and light passes through the lenses, the light ray should get slower.
My question is can we see in mere past if we use this technique?

Read more: If we slower the light rray, can we see past?

Has anyone ever tried wearing colored contacts or circle lenses through airport customs?

i'm going to japan in a couple of weeks. I was wearing my contact lenses when the DFA took my passport photo. And they made my eyes look bigger because of some light reflection or something. The only way my eyes would look like my photo is if i wear my circle lenses.

so i was wondering if anyone has ever tried wearing colored contacts or circle lenses through airport customs and will it cause problems? If they ask me to remove them then my eyes would look different than on my passport photo.

Read more: Has anyone ever tried wearing colored contacts or circle lenses through airport customs?

Has anyone ever tried wearing colored contact lenses or circle lenses through airport customs?

i was wearing my contact lenses when the DFA took my passport photo. And they made my eyes look bigger because of some light reflection or something. The only way my eyes would look like my photo is if i wear my circle lenses.

so i was wondering if anyone has ever tried wearing colored contacts or circle lenses through airport customs and will it cause problems? If they ask me to remove them then my eyes would look different than on my passport photo. I'm bound for japan in a couple of weeks.

Read more: Has anyone ever tried wearing colored contact lenses or circle lenses through airport customs?

Do disposable contact lenses lose their efficacy after '24 hours'?

They are supposed to be thrown away and a new pair used each day - do they "run out of energy" or just stop working after 24 hours? What makes them so disposable?

Read more: Do disposable contact lenses lose their efficacy after '24 hours'?

How long i can wear my conact lenses?

my contact lenses are bausch lomb U4 yearly soft lenses(polymacon)

Added (1). Im asking per day

Read more: How long i can wear my conact lenses?

How to see through these super thick glasses and I can already see good?

So all my life I've had really good vision. My friend has glasses and like really thick ones & I could see through them perfectly. Not just hers but every person with glasses I've met and tried I can see perfectly through them no matter how thick or thin. & every time I tell the person wearing glasses I can se through them perfectly they ask me, "really?!" & when this other girl who didn't need glasses looked through the glasses said it was blurry. So how come I can see perfectly without glasses and perfectly with them? Is this normal? Is this bad? Why? Thanks!

Read more: How to see through these super thick glasses and I can already see good?

Darkness under eyes?

Just switched back to contact lenses from glasses recently. I've always had this problem with my eyes, how it looks like I haven't slept in years but I definitely get 8 hours of sleep every night.

I quit caffeine a few weeks ago, decaf, no soda, no alcohol, cigs, drugs, nothing. Multivitamin every morning. Tried different cream, I've even been desperate enough for makeup but I'm a guy. Age 25, good shape, muscular, normal sleep schedule for I'm a college student.

I feel like putting my glasses back on, I look evil.

Read more: Darkness under eyes?

Is the printout from the eye machine the same as my spectacles?

I'm wondering if the power printed on the slip by the 'eye machine' is the same as my spectacles because I know for sure the power on spectacles is different from that of the contact lens.

Thanks!

Read more: Is the printout from the eye machine the same as my spectacles?

What does each structure of the eye do?

What do each of these eye structures do:
Fovea-
Blind spot(or optic disc)-
Optic nerve-
Lens-
Cornea-
Iris-
Pupil-

For psychology. Thanks.

Read more: What does each structure of the eye do?

Does anybody find this creepy besides me?

Hey.
So i had an Eye doctor apointment a day ago with my eye doctor.
He's an older fat bald guy who is really nice.
Anyway.
I have to return soon apparently top pick up a trial pair of glasses and he said they would call my when they were ready to pick up.
Soo.

Later at work today, i get a text message from a number saying hello, and how are my trial lenses working etc/and signatured his doctor name.
I Figured ok whatever. I guess he texted me to see whats up.
I responded and said id pick up my lenses when i get off work in a day.
Then he responds asking if i would like to go to his house to play pool with him…
Wtf?
Sorry. But am i the weirdo? Or is this just odd for a doctor to ask of this?
I rarely even see the man…

any insight? Thank you.

Read more: Does anybody find this creepy besides me?

Are my trial contact lenses my actual prescription?

The opticians sent me home with a few trial pairs. In a week I have to go back to check if they are ok and then pay £35 for them to give me my prescription.

The trial lenses have the prescription on there and they work fine, so I was wondering if the check up was necessary?

They gave me the same prescription for both eyes but when I wear glasses my eyes are different?

Read more: Are my trial contact lenses my actual prescription?

Are there contact lenses that look real/natural?

All contact lenses I have seen look fake, like when you look at them, you know theyre fake. Are there any contacts that dont look fake whilst wearing them? And what's their name?

Read more: Are there contact lenses that look real/natural?

Have you ever seen anyone with blue or green eyes wear brown or black contact lens?

I've never witnessed or hear about something like that occurring.

Read more: Have you ever seen anyone with blue or green eyes wear brown or black contact lens?

Something is moving in my eye?

Sometimes I feel small things squirming about from the inside of my eyes. It usually doesn't hurt when that happens, although at times I feel a sharp pain, as though some kind of pointy thing were being forced into it. Sometimes it get the sensation of it just falling out of my skull.
When I tell my parents, they tell me it's all in my head, and I can't find anything helpful on the internet really.
I do wear contact lenses occasionally, but they don't enhance eyesight or anything, they're just for Cosplay and stuff.
I also don't wear glasses.
Any feedback would be greatly appreciated, thank you.

Read more: Something is moving in my eye?

I got my eyes examined from my regular eye doctor, can I get my lens for my glasses someplace else?

I went to see my eye doctor, and I need new lens for my glasses, and I know he will charge a lot for them. Can I get my percription from him and go someplace else to get it filled?

Read more: I got my eyes examined from my regular eye doctor, can I get my lens for my glasses someplace else?

Does Laser Eye Surgery hurt?

Does it hurt? Any side affects? Chances if infection? Is it hard to keep looking straight during the surgery? Is there any additional answers I should know? Sorry for so many questions. I'm just really curious. I'm planning on getting it in the future. I'm tired of wearing glasses and contact lenses.

Read more: Does Laser Eye Surgery hurt?

Right eye is worse than left eye?

i am short sided so i cant see far - i do have glasses but mostly just wear them at school, and the lenses are different, if i cover my left eye my right eye is really really bad and blurry and if i cover my right eye i can see fine with my left eye, i am right handed and mostly sleep on my right side - does this have anything to do with it? Should i start wearing my glasses more?

Read more: Right eye is worse than left eye?

Those who speak English, can you help?

Hi

I am reading about an ophthalmic instrument and I don’t understand the expression in capital letters. I am not a native English speaker. Explain this expression to me, please:

“Press the lens retainer since the lens is in contact with the lens support sideways.

LET YOUR HAND GO with the spectacle frame to prevent PD value shifting.”

Scarlett

Read more: Those who speak English, can you help?

Accidentally used clear care on circle lens in a flat case, are they ruined?

I used clear care in a flat case with new circle lens and let it soak 8 hours without realizing i used it. I haven't worn them but I rinsed the clear care out of my case and put the lenses in the same case with normal Alcon solution. Are they okay or are they ruined?

Read more: Accidentally used clear care on circle lens in a flat case, are they ruined?

Will it harm your eyes if you touch them (with clean fingers)?

I've recently gotten contact lenses, and I was taking them out today. While I was doing so, the lens fell out without me knowing it, so I kept on attempting. I later realized that the lens wasn't in my eye and already fell out when my eye was turning red and hurting more. Is my eye harmed because I touched it so much?

Read more: Will it harm your eyes if you touch them (with clean fingers)?

Psychology Help if Possible?!

1) Low-amplitude waves correspond with _______ colors, and high-amplitude waves correspond with __________ colors.

a. Dim, bright
b. Bright, dim
c. Natural, dim
d. Soft, natural

2) When Joe wakes up in the morning and opens his eyes to a bright sunlit room, a round muscle in each eye, the ____________ , adjusts the ___________ to regulate the amount of light entering his eye.

a. Iris, pupils
b.iris, corneas
c. Sclera, retinas
d. Pupil, lenses

Read more: Psychology Help if Possible?!

Forgot to take out my contact lenses before I got into the shower, will they still be okay to wear?

I had to make them wet so they would come off

Read more: Forgot to take out my contact lenses before I got into the shower, will they still be okay to wear?

Why are my contacts burning my eyes? - 1

I have been using the same contacts (Acuvue Oasis hydroclear) for 3 years and the solution Biotrue for a couple years. The last two days my eyes will burn at random times for a few minutes and then go away. This morning they burned for quite a while before it went down.

Read more: Why are my contacts burning my eyes? - 1

First time wearing contacts - feels like eyelash in eye?!

I purchased the Desio Lenses, I have 20/20 vision and have no problems in general with my eyes, and my family has no history of eye problems and all have near perfect vision.
I got these so I could change my eye colour as I have extremely dark brown eyes.

Any way, since I had never worn contacts before, I did my research, watched tons of videos and I eventually felt confident to do it!
Well, it sure was a struggle! Apparently it's much easier than it looks. I only practiced on my right eye as I didn't want to irritate both. After a solid hour and a half I finally got it in, but it did not adjust. I made sure it was as clean as possible but it just wouldn't adjust, it felt like I had an eyelash at the very top.
I put the left contact in first go and had no pain what so ever.

I'm scared that I scratched my cornea, but my mind is telling me I just irritated my eyes - as before I put in the contact my eye was itchy as all hell, so I rubbed it for a while.
I can't afford to see the eye doctor right now, so someone reassure me and tell me what else I can do!

Thanks in advance!

Added (1). I most definitely took it out! I'm starting to think there's some mascara in there (I was wearing some and forgot to take it off!) Thank you for your answer - I need to learn to love my dark eyes!

Added (2). I figured out the problem! So for any one who's reading and having a similar experience - my contact was torn, torn, torn! I was cleaning it when I noticed. If you have pain when you wear them, your contact is most likely torn!

Read more: First time wearing contacts - feels like eyelash in eye?!