Breathing Eyes and Contact Lenses
Did you know that our eyes breathe? In a sense they do, as they take oxygen from the air, diffuse it via our tears over the cornea, and even dispatches carbon dioxide into the air—much the same way as our normal inhaling/exhaling process. Corneas (the clear window at the front of the eye) have no blood vessels to feed them, so they require adequate amounts of oxygen to remain healthy and stave off infections and complications that threaten vision.
Contact Lenses As a Preferable Vision Correction Option over Surgery
Outside of eyeglasses, the two most prevalent means of vision correction today are surgery (most often the laser procedure called LASIK) and contact lenses. Many ask that of the two options, which is better? Both methods allow for a ‘natural look’, but with differing approaches.
Astigmatism No Longer Bars You from Contact Lenses
Astigmatism affects over 40 million Americans and is caused by an irregularly shaped cornea. When the cornea, which acts as a window, is a spherical shape it focuses light correctly upon the retina at the back of the eye; this produces sharp images at all distances. Conversely, in instances where the cornea takes on a more oval shape, the light is focused at two retinal locations rather than one and blurry vision is the result.
Pregnancy and Eye Health
With all the other hormonal and physical changes going on, it should not be surprising that eyesight can also be affected. For the most part, these signs are relatively minor and should not trigger undue worry; they occur as part of a conventional pregnancy, and revert to normal after giving birth. Your eye doctor should be alerted to the fact you are expecting so that any prenatal changes can be adequately monitored, especially if there are pre-existing eye conditions.
Truth Squad: Supplements for Eye Health
Lara Salahi & ABC NEWS MEDICAL UNIT
As with many areas of health, not all of these claims are backed by solid research. But while many eye health experts approach popularly marketed supplements, that tout better eye health, with skepticism, there is research that suggests at least some supplements may indeed benefit those at high risk of advanced eye diseases.