Questions and Answers
Which of the given statements about the anatomy of the lens is true?
Which type of water-insoluble protein is primarily associated with nuclear cataract formation?
Which disease is associated with the distinct cataract observed in the examination of a 45-year-old male patient?
Which syndrome presents with bilateral congenital cataracts, glaucoma, developmental delay and renal abnormalities?
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What type of cataract is shown in the image associated with a progressive blurring of vision in a 60-year-old patient?
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Which systemic disease is commonly associated with shield cataracts?
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Which of the following steps is NOT involved in the procedure of extracapsular cataract extraction (ECCE)?
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Study Notes
Lens Anatomy and Physiology
- The lens has the maximum refractive index at its center.
- Sutures in lens fibers appear as a straight ‘U’ shape from the anterior surface.
- The strong adhesion between the posterior lens and the hyaloid membrane is known as the suspensory ligament.
- The lens has a refractive power generally ranging from 16 to 17 diopters (D).
Cataract Presentation and Types
- A 70-year-old woman with yellow hue and central opacification indicates nuclear cataract, primarily associated with high-molecular weight (HMW) proteins.
- Common conditions leading to distinctive cataracts include:
- Myotonic dystrophy linked to specific cataract patterns.
- Diabetes mellitus may cause unique cataract forms like the snowflake cataract.
Congenital and Systemic Associations
- A 5-year-old boy with congenital cataracts, glaucoma, developmental delays, and renal abnormalities likely suffers from Lowe syndrome.
- Shield cataracts, characterized by dense anterior subcapsular plaques, are commonly associated with myotonic dystrophy.
Surgical Considerations
- Extracapsular cataract extraction (ECCE) involves several key steps including:
- Incision at the limbus, hydro dissection, and lens removal.
- Understanding the surgical procedure is crucial for managing cataract cases effectively.
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Description
Test your knowledge with this quiz focused on previous year questions related to various diseases and anatomy of the eye including Lens, Glaucoma, Cornea, and more. Perfect for students preparing for exams in ophthalmology. Challenge yourself and see how well you understand this medical field!
