Patient with open angle glaucoma with 71) of myopia, complains of blurring of vision on administration of pilocarpine. What is the reason for the blurring?
Ans. is 'a' i.e., Small pupil Pilocarpine Pilocarpine induces contraction of the ciliary muscles and results in accommodation and ensuing fluctuating myopia. Pilocarpine is a miotic and thus results in the pin point pupils. This leads to decreased amount of light entering the eyes and thus worsens night blindness and also causes contraction of the peripheral visual field. Thus we can say that pilocarpinewosens the myopia in an already myopic patient and causes blurring of vision due to miosis (small/ pin point pupils, contraction of the ciliary muscles. It also causes decreased visual acuity in the patients with axial lens opacities.
Small pupil
Increased myopic asymmetry
Increased hypermetropic asymmetry
Increased astigmatism