Nothing is stopping from walking immediately after the surgery. It is advised to refrain from any heavy exercise for at least a week after the cataract surgery. If you have had a premium toric intraocular lens implanted, it is advisable to avoid heavy exercise for 3-4 weeks to avoid rotation of the lens. A toric intraocular lens is aligned at a particular axis (0-360 degrees) to correct astigmatism and can result in marvelous vision after cataract surgery. However, even mild rotation of an intraocular lens can lead to a suboptimal visual correction.