What is meaning of +/- 4D in eye for job application requirement
Puzzled about what +/- 4D in eye means for a job application requirement? Quickly get the answer from the expert responses below.
Right eyesight and constant distance (sph -2, cyl -0.5, axis 10 ,v/a 6/9) and left eyesight (sph -2.25,cyl -0.50,axis 180 , v/a 6/9) - this is mentioned for the Forest Guard application. I wish to know then what is +/-4D? What does this mean?