Patients who have undergone Cataract surgery in one eye will have clearer vision compared to the affected eye which increases the pressure on the treated eye. The increased pressure on a single eye can be stressful. Second eye Cataract surgery can be particularly helpful for those people who are very nearsighted or very farsighted. Patients with such problems will be visually unbalanced after the first surgery. When the surgery is conducted, their refractive error is corrected with an intraocular lens in the eye. These patients can no longer wear their old glasses. If the lens for the eye is removed from their glasses, patients may feel dizzy and may have problems with depth perception or some might experience double vision. But if these patients stop wearing glasses while waiting for their second Cataract surgery, then they are functioning with just one eye (corrected eye) which will disrupt depth perception and binocular vision. These problems can only be corrected if surgery is performed on the second eye. https://www.eyeqindia.com/cataract-surgery-why-second-eye-cataract-surgery-is-important/