Tuesday, July 12, 2005

Blind

My eye sight has become really bad over the last few months. Bad enough that I have trouble seeing my computer monitor with my contacts in (this is not good, considering I spend about 10 hours a day looking at a computer monitor). I can see better with my glasses, but I hate to wear them all the time. I'm going to see the eye doctor next Monday and see if I can get a pair of contacts that will work for the next five months. I searched the web and found this interesting explanation of why eye sight changes during pregnancy:

This change in eyesight is a really strong effect for some women - maybe 10-20% or so. Within a few months of getting pregnant, they pull out the glasses that they wear ONLY when they're pregnant, and once their baby is delivered, the glasses go back into storage. But this effect doesn't happen to all women.

The eye has the cornea and the lens up near the front to bend the light so that it lands on the retina. The retina, which sends the image to the brain, is at the back of the eye. The eye is filled with some clear liquid, and some clear jelly, and is roughly the size of a golf ball. There are two main reasons for this change in focus of the eyes that some women get.

The first one is that the cornea, right at the front of the eye, gets about 3% thicker. This is because higher levels of a hormone, called progesterone, make the cells bloat up. This increased thickness changes the cornea's ability to bend light. This usually happens by 10 weeks into the pregnancy, and is back to normal by 6 weeks after the delivery. The second reason is that the pressure in the eye drops by about 8 or 9%. So the eyeball gets a touch smaller. These two effects combine in some women, to send their eyes right out of focus, whenever they get pregnant.



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