Case Studies in Ophthalmology
Cases for the Ophthalmology Clerkship
Note to Medical Students on the Ophthalmology Rotation at the University of Iowa:
Print the question and answer sheet (Ctrl-Print or Command-Print) and enter your answers on it. You may prefer to type your answers on this page and then print it. If you do this, be careful that your full answer shows in the printout. Experience with Internet Explorer has been less than optimal.
Return the printed copy with your answers to Michelle Snyder or Dr. Kemp via campus mail (11290 PFP) or scan as a pdf and email to Michelle at michelle-r-snyder@uiowa.edu or Dr. Kemp at pavlina-kemp@uiowa.edu.
Case #1 Intraocular Lens
History
Three months earlier, the patient had an uneventful intracapsular cataract extraction with placement of an anterior chamber lens. Initially, the visual acuity was good. Suddenly, following a fall, the patient experienced diplopia and some blurring of vision. After pupillary dilation, the intraocular lens was found to have moved upwards and the haptics were visible in the pupillary space.
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Question #1
What types of intraocular lenses are used in cataract surgery?
Question #2
What is the average power of an intraocular lens?
Question #3
Can an intraocular lens be implanted years after extracapsular cataract surgery?
Question #4
What materials are intraocular lenses manufactured from?
Question #5
What are the most common complications of intraocular lens implantation?
Question #6
What are the advantages and disadvantages to the patient of intraocular lens implantation?
References
Stark WJ, Whitney CE, Chandler J, Worthen DM: Trends in intraocular lens implantation in the United States. Arch Ophthalmol.. 1986; 104: 1769-1770.
Maguen E, Nesburn AB, Jackman N, Macy JI: Broken semiflexible intraocular lens implants. Am J Ophthalmol. 1895; 99:170-172.