The clinical value of using a retinometer in predicting visual acuity after cataract surgery;

Objective Evauate the clinical outcome of the retinometer prediction on the potential best post-surgical vision in patients with cataracts, and identify the common encountered factors which may affect the accuracy of such an examination.

Objective:To observe retinometer for potential visual acuity before YAG laser posterior capsulotomy.

Clinical study for HEINE retinometer in predicting postoperative visual acuity before the operation of silicone oil removal combined with intraocular lens implantation in silicone oil infusion eyes;