is it possible to find out the degree of your eye without going to the doctor?
2007-05-31 15:08:58 · 7 answers · asked by please call me angela 2 in Science & Mathematics ➔ Medicine
Yes you can through Physics. q=image/object and with the use of refraction
2007-05-31 17:14:12 · answer #1 · answered by giftedman88 3 · 0⤊ 0⤋
Where I live you have to have a certain 'field of vision' measured in degrees to obtain a driver's license. I think this is what your asking about, vice a prescription strength.
You can 'ballpark it', but for an accurate measurement you'll need to visit your doctor.
Sit comfortably and look straight at the wall, don't cut your eyes left or right...don't turn your head...have a helper move something along the wall starting farther away than you can see. When it comes into view, mark where it is. Repeat on the other side. Now measure how far your eye is from the wall.
eye
../|\
./.|.\
/_|_\
wall
The 'degrees of vision can now be determined from the triangles. Since this isn't amazingly accurate we'll go with
'close Eng' values. If you were 4' from the wall, and the marks are 6 feet apart, you'd have 90deg of vision...which is very narrow.
Regular driving in my state is 105deg I think. At 4 feet you need to have an 11 foot wide field of view to make that. The 'tangent' of an angle is the opposite side over the adjacent side...the adjacent is the 4feet from the wall. The tangent of 52.5 degrees (half the 105 since the measurement is to the center) is 1.3...multiply the 4 and get 5.2 feet...double it...and your about 11.5 feet...
2007-05-31 23:12:29 · answer #2 · answered by Clif S 3 · 0⤊ 0⤋
Not reliably no. You need to go so they can tell other things besides just your perscription. A good doctor will also check for things like astigmatism, your optic nerve, cataracts, etc. He will also be able to tell you if you need glasses full-time or just for reading as a preventative measure for your eyes getting worse.
If you go to the pharmacy and try on random strengths of reading glasses and just buy one you will make your eyes worse because they will have to strain harder with an inaccurate perscription.
2007-05-31 22:31:54 · answer #3 · answered by pspoptart 6 · 0⤊ 0⤋
you should go to an eye doctor. it's more accurate. your eyes can also have different degrees. my right eye is worst than my left eye.
when i went to an eye doctor to check my eyes, the only thing i felt alittle disconfort was when they blasted some air into my eyes. the rest is cake
2007-06-01 01:48:11 · answer #4 · answered by the common cold 4 · 0⤊ 0⤋
hi angel
you can go to a pharmacy and try the diffrent eye glasses.
but I think you should still go to the doctor
eyes are a very delicate part of the body
2007-05-31 22:12:31 · answer #5 · answered by 1960story 2 · 0⤊ 1⤋
An optometrist can measure your refraction and prescrbe glasses , assuming your retina is normal.
2007-06-02 09:29:03 · answer #6 · answered by J.SWAMY I ఇ జ స్వామి 7 · 0⤊ 0⤋
degree of what?
2007-06-02 17:50:41 · answer #7 · answered by einsteinliam2 4 · 0⤊ 0⤋