Inclusion Criteria:  1. Age ≥18 years old. 2. Emmetropic patients with normal fundus. 3. Patients with SLE diagnosed by a rheumatologist with no ocular involvement upon clinical examination.  Exclusion Criteria:  - 1. Patients with history of intraocular surgery as cataract surgery ,retinal detachment surgery, anti-glucoma surgery.  2. Patients with significant media opacity as corneal opacity, cataract. 3. Patients with ocular diseases as glaucoma, uveitis. 4. Patients with systemic diseases as diabetes mellitus, hypertension.