I have many dioptries and I am in my early twenties...I find it scary...I go for regular check ups but they say I have it b/c my eyes were built like it (big). but why is it constantly deteriorating..
2007-10-27 21:55:58 · 5 answers · asked by lamariana 1 in Health ➔ Optical
Let's assume that light goes from the left to the right. Light rays move from the left to the right. In the middle of those light rays, like 5 lines going from the left side of the page to the right side of the page, put a glass window, or a vertical line or two lines right next to each other. This is a window. A regular window. No deviation of the light rays. They all hit the window at the same angle, go straight through and keep on going.
Now put a lens vertically in the path of the light rays. The center light ray is hitting the lens as if it were a window. So it goes straight through. The other light rays hit the lens (which for this discussion right now, is thick in the center and thin at the edges, sort of like an arc on both sides), at an angle and they are then bent and cross the center line on the right side of the lens at a certain distance from the lens. You might draw them crossing the mid line at about 3 inches from the lens. That distance is the focal distance of the lens. The more powerful the lens, the more it will bend the light rays.
P is in diopters, the power. . . and it is equal to 1/d where d is in meters.
A lens that takes parallel light rays and bends them so they focus at 1 meter away, is a +1.00 diopter lens.
If it focuses light a half meter away, +2.00 diopters.
third of a meter, +3.00
quarter of a meter, +4.00
eighth of a meter, +8.00
tenth of a meter, +10.00
Your eyes are 'too powerful'. This is because the eye is too long as in axial myopia so that the lens system, made up of the cornea and the lens itself, focus light in front of the retina. If your eyes were +1.00 too powerful, they'd give you a -1.00 lens to 'neutralize that power so you could see far away.
If you were +2.00 too powerful, a -2.00 lens would be your Rx.
+3.00 too powerful, you'd get a -3.00 Rx.
These minus lenses divert light. They make the light rays move OUT instead of IN. And they do it as IF the light rays came from a point on the left side of the lens. So if the minus lens move light outward as if it came from a meter away on the left side, that would be a -1.00 lens.
If if bent light rays out as IF they came from a half meter away, -2.00. etc.
As you age, the lens inside the eye grows. It grows like an onion, layer after layer after layer after layer. We can actually look at the lens and see a time line of lens fibers from the day the lens was made to today...however long that is. Sort of like rings of a tree.
As it gets bigger, it bends light more. So as you age, your nearsightedness will get 'worse' as your lens gets even more strong. This doesn't really affect your eyes. It just affects the lens and it's ability to bend light. By the time you are 40 or so, the lens is so big it's hard to bend. That's why older folks get 'readers', to help do the work that the harder lens can't do anymore.
So your eyes are NOT getting worse. They just change focus every few years and you need to get a new Rx, just like the rest of us. As long as you can see well with your new Rx, you have good eyes.
If you decide to go get LASEK or LASIK or whatever, your lens inside your eye will still grow, and your Rx will still change every few years. If you get the laser Rx, your distance vision will then be pretty good. But it'll change as you age. It just does.
Your eyes are NOT deteriorating. They just change with age.
2007-10-28 17:58:12 · answer #1 · answered by ? 5 · 0⤊ 0⤋
You can eat tons of carrots and spinach, but that won't help your eyes one little bit. Carotene is good for the general health of the eyes, but certainly won't improve vision, or reverse an existing problem.
Laser surgery may be an option for you once your vision has stabalized for a couple of years. That is something you will have to discuss with the Opthalmologists at a laser center.
2007-10-28 10:28:48 · answer #2 · answered by Footprintz 7 · 1⤊ 0⤋
Spinach is supposed to be good for eyes. Spinach is not always a favourite because it has just been boiled. Try baby spinach leaves in a salad or just add them to a cheese and tomato sandwich. Curried spinach is great with potatoes as is spinach and lentil which can also be made into a soup.
2007-10-28 08:38:41 · answer #3 · answered by stef 4 · 0⤊ 1⤋
carrots are supposed to be good for your eyes...The vitamins.
Sunglasses with UV protection to avoid cateracts.
2007-10-28 04:59:15 · answer #4 · answered by James J 3 · 0⤊ 1⤋
lasik
2007-10-28 04:59:24 · answer #5 · answered by @NGEL B@BY 7 · 0⤊ 0⤋