After cataract surgery
, glasses are required for distance vision for correction of astigmatism
induced by surgery and for any difference in the spherical power between power of intraocular lens
implanted and actual power required. The usual amount of astigmatism induced by surgery depends on the type of surgery, with phacoemulsification
accounting for +/- 0.5 dioptres andsmall incision incision cataract surgery accounts for =/- 1.0 dioptres.
Near vision is not possible after cataract surgery because of total loss of accommodation. Hence all patients require correction for near vision. However if you want to avoid glasses for near vision after cataarct surgery, you have to get multifocal intraocular lens or accommodative intraocular lens.