1. Primary Cataract in an Elderly Patient

• Age: 72 years
• Symptoms: Gradual blurry vision over 6 months, difficulty driving at night, color changes.
• Medical History: No significant diseases.
• Examination: Partial white opacity in the anterior lens of the right eye, normal eye pressure.
• Diagnosis: Primary cataract (age-related).
• Treatment: Discuss cataract removal surgery with intraocular lens (IOL) implant; monitor vision.

2. Secondary Cataract due to Diabetes

• Age: 58 years
• Symptoms: Blurry vision, rapid loss of visual acuity in the left eye.
• Medical History: Type 2 diabetes for 15 years, poorly controlled blood sugar.
• Examination: Posterior cataract in the left eye, abnormal lens opacity.
• Diagnosis: Secondary cataract due to diabetes.
• Treatment: Improve blood sugar control; consider cataract surgery after stabilization.

3. Congenital Cataract in a Child

• Age: 6 years
• Symptoms: Difficulty seeing clearly since birth.
• Medical History: No family history or known diseases.
• Examination: Severe lens opacity, very low visual acuity in the affected eye.
• Diagnosis: Congenital cataract.
• Treatment: Early surgery to remove cataract and implant intraocular lens to improve vision and visual development.

4. Surgical Cataract

• Age: 45 years
• Symptoms: Sudden loss of clear vision after previous eye surgery.
• Medical History: Underwent lens surgery 3 years ago due to prior injury.
• Examination: Cataract formation post-surgery with lens changes, normal eye pressure.
• Diagnosis: Surgical cataract.
• Treatment: Surgery to correct condition; evaluate opacity extent and choose appropriate procedure.