Our eyes have two types of refractive error - glass power
1.spherical- (sph)
2.cylindrical- ( cyl)
Cylinder Power always works in a perticular axis only.
So cyl and axis are prescribed accordingly.
Example -0.50 *180
Where 0.50 is number of power
And 180 is axis number .
Whereas spherical power works in all 360 degree.so no axis is written with (sph.)
Glass power again has two types
1. Minus means -use to see for distance
2.plus means - use to see for near object
Next Steps
Consult ophthalmologist for more details
Answered2022-09-16 16:47:38
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