Khushikansal1

optometry optometrist convex lens lenses ophthalmology concave lens spherical and cylindrical lens ocular optics spectacle spectacle lens photochromic cylindrical lens spherical lens power lensometer hand neutralization ophthalmologist chromatic aberrations optical levoversion dextroversion depression elevation versions vergence disconjugate movement conjugate movement sclera oblique muscles rectus muscles voluntary muscles extraocular muscles eom ocular muscles geometrical optics angle of the eye axes of the eye allied sciences fixation axis visual axis angle reduced eye schematic eye eye investigations blood & nerve supply optometric instruments