On performing refraction using plane mirror on a patient who's has a refractive error of -3 D sphere with -2 D cylinder at 90 degree from a distance 1 metre under no cyclopgia, the reflex would be seen to move
Error of -3 D sphere that is person using concave sphere(diverging) advised in cases of myopia. Reflection of ligth with Retinoscope 1. Against / opposite movement : Myopia > -1 2. With / same movement Myopia < -1 or Emmetropia = 1 or Hypermetropia = + value 3. No movement Myopia = -1 This patient is having a -3DS with -2DC x 90 - compound myopic astigmatism, so the reflex would move in opposite direction to the beam irrespective of the axis
With the movement in the horizontal axis and against the movement in the veical axis
With the movement in both the axis
Against the movement in both the axis
With the movement in the veical axis and against the movement in horizontal axis
Optics and Errors of Refraction