Test: Diseases of Lens - 3 - NEET PG MCQ

• Inferonasal–Homocystinuria
• Supero-temporal–Marfan’s syndrome
• Inferior and forward–Weil-Marchesani

Lowe's syndrome is a congenital defect in amino acid metabolism that leads to metabolic cataracts.

Toxic cataract may develop as a result of the following medications:

• Steroids
• Phenothiazines
• Long-acting miotics
• Amiodarone
• Busulphan
• Gold

Rubella does not exhibit subluxation of the lens.

Metronidazole does not lead to the development of cataracts.

The most frequent cause of endophthalmitis is Staphylococcus epidermidis.

Among the listed risk factors, hypertension is the least documented. Recurrent diarrhea leads to dehydration crises, which are associated with causing cataracts.

Phacoemulsification is a sutureless surgical procedure.

The primary metabolism of the lens is anaerobic, resulting in lactic acid production. In the other three options, the lens is absent from its position.

Phacoemulsification offers key benefits, including minimal postoperative astigmatism and rapid recovery.

The respiratory quotient (RQ) is the ratio of CO₂ to O₂. In the lens, an RQ of 1 indicates that carbohydrates are the primary energy source.

Sutural cataracts involve the sutures of the lens.

Phacomorphic glaucoma arises in the presence of an intumescent cataract, while Phacotoxic glaucoma is associated with trauma. Furthermore, Phacolytic glaucoma is linked to Morgagnian cataract.

USG A-scan assesses the axial length, while USG B-scan is utilised to inspect the posterior segment of the eye.

• Additional characteristics of Hallermann-Strief syndrome include microphthalmia.
• Alterations in macular pigment.
• Coats' disease.

A slit lamp examination is the preferred technique for diagnosing a dislocated lens.

The reasons for the frequent alterations in presbyopic glasses include:

• Early cataract (specifically, intumescent cataract)
• Advanced stage of primary open-angle glaucoma
• Diabetes (this is not to be confused with diabetic cataract, but rather diabetes itself)

AC lenses may lead to complications such as:

• glaucoma,
• uveitis, and
• corneal decompensation.

Hydration results in cortical cataracts, while sclerosis causes nuclear cataracts.

Zonular cataracts are linked to a lack of vitamin D.

The primary reason for uniocular diplopia is the subluxation of the lens. Other contributing factors include:

• Intumescent cataract
• Polycoria

Reduced visual clarity is the primary factor taken into account for performing cataract surgery.

The Vossius ring is a characteristic associated with concussion injuries, found in the anterior capsule of the lens.