Approximately 2/3 of refraction of light rays occurs at the front surface of the cornea, actually at the air-tear film/cornea interface. The tear film coats the surface of the cornea. The other 1/3 of refraction occurs in the crystalline lens inside the eye. ...See more

EYE HEALTH REFRACTION OPHTHALMOLOGY LASIK SURGERY (RADIAL KERATOTOMY) REFRACTIVE SURGERY

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Dr. David G. O'Day answered:

Told yesterday I have corneal ulcer from contacts. Tiny white spot not on iris. Treating with drops. Now have stye on same eye on bottom lid. Worry? In brief: Ulcer is serious

A corneal ulcer can be a potentially sight-threatening problem and should be considered as a serious eye infection.

Stop the contact lenses and follow your Eye M.D.'s treatment recommendations exactly. The stye is pretty much self-limited, and will be effectively treated with the antibiotic drops you are most likely using for the corneal ulcer. Also do hot compresses to the lids four times a day. ...See more

CORNEAL ULCER HORDEOLUM ULCERATION STY (HORDEOLUM)

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Dr. David G. O'Day answered:

What occurs to the iris if the color looks dark and faded after suffering a thermal burn? In brief: Probably not iris

the color change is probably not from damage to the iris.

Rather, it could be from damage to the cornea or conjunctiva on the surface of the eyes.

BURN (FROM HEAT OR FIRE)

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Dr. David G. O'Day answered:

Any ideas why is it that I have a golden rings in my eyes? In brief: Wilson's Disease

it may just be the coloration of your eyes, but when someone talks about golden rings in the eyes, Eye MD's worry about the possibility of Wilson's Disease, in which copper accumulates in different sites in your body.

It is treatable, but must be diagnosed and treated appropriately. There are brownish-golden accumulations of copper in a ring around the corneas in these patients. ...See more

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Dr. David G. O'Day answered:

I have bags under the eyes, what's a good way to reduce.? In brief: Cool compresses

some recommend cool compresses to shrink the amount of fluid under the skin.

Amazingly, some have reported improvement with application of Preparation H (a hemorrhoidal cream) to the skin of the lower eyelids. Do NOT get it in your eyes if you try it, ...See more

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Dr. David G. O'Day answered:

Had lots of sand splashed in my eyes while on beach; removing sand for days after. How do my eyes deal with lots of sand coming in? Any harm? Thx. In brief: Wear sunglasses

its not good to get a lot of sand in your eyes.

Suggest you wear wrap-around or occlusive sunglasses at the beach. If sand does get in your eyes, rinse thoroughly with water or "Eyewash" which can be bought at a drugstore. ...See more

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Dr. David G. O'Day male

Dr. David G. O'Day
male