Questions for Lens
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Name the 3 areas in the lens where cataracts form. | Subcapsular, Nuclear, Cortical
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| What are the main symptoms of cataracts? | Decreased vision, Increased glare (especially with PSC), Decreased vision contrast, and Change in color perception
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| What is a brunescent cataract? | Dark brown, hard cataract
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| What is a Morgagnian cataract? | A hypermature cataract - liquified peripheral cortex, floating hard nuclear
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| What is a mature cataract? | Completely white cataract
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| Which type of cataract is frequently associated with other diseases and/or corticosteroid usage? | PSC (Posterior Subcapsular)
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| What test are important in evaluating the proper IOL power? | Axial length, Corneal curvature (Keratometry), Anterior chamber depth and width
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| How do we evaluate the corneal endothelium and why? | By slit lamp exam (looking for endothelial guttatae) and the endothelial cell count. Patients with low ECC may develop corneal edema after cataract surgery.
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| What is the most common type of cataract surgery performed? | Phacoemulsification
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| What are the 2 most common types of IOLs used? | Posterior chamber and Anterior chamber IOLs
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| What is the leading cause of decreased vision in uncomplicated cataract surgery? | CME- Cystoid Macular Edema
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| What topical medication is used prophylactically to prevent and to treat Cystoid macular edema? | Topical NSAIDS - Bromfenac, Nepefenac
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| List five symptoms we should be aware of in the post-operative cataract patient when they should be told to come in immediately. | Increased pain, decreased vision, vomiting, loss of some visual field, increased hyperemia (Redness)
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| Can you name five possible causes of post-operative cataract symptoms that require immediate care? | Intraocular hemorrhage, Infection or inflammation, Glaucoma, Wound leaks, Retinal or Choroidal detachment
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| What is the most dreaded post-op complication? | Endophthalmitis
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| What is Phthsis Bulbi? | End stage of diseased eye- Is shrunken, scarred, and enophthalmic
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| In evaluating cataracts, what tests do we use to determine their need for surgery? | Vision contrast sensitivity, Glare testing (BAT- Brightness Acuity Test), PAM (Potential Acuity Measurement)
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| How do we treat posterior capsular opacification? | YAG laser
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