I went to the optician today and I need to get some glasses. I have some basic knowledge about ophthalmology as I'm about to be a doctor, so I know the basics about how light focuses on the eye etc etc. And I understand the basic concept of astigmatism and how the eye is shaped more lke a rugby ball than a football....
Anyway, my prescription from the optician is:
R: SPH -1.00 CYL -0.50 Axis 115
L: SPH -1.25 CYL - 0.50 Axis 90
I understand that it shows myopia in both eyes, left slightly worse than right, but what do the other numbers mean? It's something to do with the degree of astigmatism, but what do they actually show? And what does that mean in terms of my eyes?
Just interested!!!
2006-06-12 10:20:01 · 7 answers · asked by Jen 5 in Science & Mathematics ➔ Medicine
I managed to work out myself that I had an astigmatism......is it mild or severe though?
2006-06-12 10:37:54 · update #1
SPH = SPHERE
The amount of long or short sightedness. It always has a plus (+) or a minus (-) sign in front or above it. If the vision in one eye is very poor, the word 'balance' or 'bal' may be written. For example, i'm -3.00 in both right and left. So baisically, it tells you how blind you are
CYL = CYLINDER (Astigmatism) This is the measure for astigmatism. Again, there is always a plus (+) or minus (-) sign present
AXIS - This will only appear if there is a value for cylinder, as it relates to the cylindrical lens. It will be a number between 1 and 180. It may or may not be written with a degree 'o' symbol after the number.
Hope this helps
2006-06-12 10:31:47 · answer #1 · answered by Anonymous · 3⤊ 0⤋
You are near sighted.
You have an astigmatism
Last number is the degree of astigmatism.. the angle of the shape
2006-06-12 10:33:14 · answer #2 · answered by ladyinlab 2 · 0⤊ 0⤋
It's a bit complicated to explain without pictures, but here goes. If you imagine that the curvature of a sphere is the same in all directions like a basketball, then you sort of understand the situation in your left eye. Most eyes don't have exactly the same curvature in all directions. This is sort of like the situation with a football. The curvature of the football is different along the laces versus along the stripes. The sphere and cylinder numbers describe the two different curvatures of the eye. The axis specifies the orientation of these curvatures to one another.
2016-03-27 01:56:04 · answer #3 · answered by Anonymous · 0⤊ 0⤋
You are not very myopic and your astigmatism is shown to be mild by the low cyl.
2006-06-16 06:23:47 · answer #4 · answered by Fluorescent 4 · 0⤊ 0⤋
your astigmatism is very mild..
your eyes generally have very mild myopia and astigmatism.
2006-06-13 20:18:16 · answer #5 · answered by prep 1 · 0⤊ 0⤋
i am glad that you told me some of what it meant as i was completely confused
you have now destroyed my reputation - my kids think i know everything
sorry i couldn't help more
2006-06-12 10:23:17 · answer #6 · answered by rheainscotland 2 · 0⤊ 0⤋
You are about to be a doctor, look it up you lazy ba$tard
2006-06-13 04:14:41 · answer #7 · answered by snuffy_muffy_eater 3 · 0⤊ 6⤋