One of the most common eye diseases is clouding of the lens of the eye. The prevalence of cataracts increases with age. All people over 70 are at risk of cataracts. The most common symptom of this disease is gradual blurring of vision without pain. In people with diabetes, the chance of developing cataracts increases fivefold. Cataract treatment is surgery, which is usually accompanied by the implantation of an intraocular lens, and after the surgery, which is often performed on an outpatient basis, the person can have good distance vision without using glasses. There are lenses that can give the patient distance and near vision at the same time. At Torfeh Eye Hospital, the latest cataract surgery methods are used. Cataract surgery can be performed under general anesthesia, with local anesthesia, or with topical drops. In the last three decades, great progress has been made in correcting refractive errors with lasers. Torfeh Hospital uses the most advanced laser surgery equipment and methods (Femto-LASIK-LASEK) to remove glasses. Before patients undergo refractive surgery, complete imaging tests are performed in the paraclinical section. There is a cross-linking device for patients with keratoconus or corneal bulging in this hospital and it can greatly help prevent the progression of this disease