Glaucoma The cornea endothelium is derived from which structure? | OphthalmologyWeb: The Ultimate Online Resource for Ophthalmologists

Thursday, April 17, 2008

The cornea endothelium is derived from which structure?

Neural crest
Endoderm
Mesoderm
Ectoderm

Correct Answer: Neural crest

The corneal endothelium is derived from the neural crest.

For more information on specular microscopes, click here.
For a video presentation by Kevin Corcoran "Medicare Reimbursement for Specular Microscopy", click here.

The photograph below depicts:
1. A punctum occluded by an intracanalicular collagen plug
2. A punctum occluded by a silicone punctal plug
3. A punctum occluded by punctal cautery
4. A punctum occluded by an extruding Jones tube
check the answer
The patient depicted in the photograph below would be best treated with:
1. Acetylcysteine 10% drops
2. Prednisolone drops
3. Sodium cromolyn drops
4. Olopatadine drops
check the answer
A 40 y.o. female pictured below comes to the office with swelling of both upper lids, mild shortness of breath and symptoms of dry eyes. One would expect to see as part of her work up:
1. A monocytic B cell infiltrate of her lacrimal glands
2. Pain on palpation of her lacrimal glands.
3. An elevated ACE.
4. A history of breast cancer.
check the answer
The following is true of the photograph below:
1. This particular stain stains only devitalized and dead cells and mucus.
2. This eye has been stained with 2% rose Bengal.
3. This stain pools in epithelial erosions and stains exposed basement membrane.
4. This stain may be a more sensitive indicator of early or mild cases of keratoconjuncitivitis sicca.
... check the answer
After permanent punctal occlusion with cautery:
1. 5-10% rate of recanalization is expected.
2. 10-20% rate of recanalization is expected.
3. 20-30% rate of recanalization is expected.
4. 30-40% rate of recanalization is expected.
check the answer

Volk iNview
iPhone Fundus Camera The Volk iNview ... view product
Selecta Trio™ YAG Laser, SLT and Photocoagulation
The Lumenis Selecta® Trio™ ... view product

View all Featured Products »

Keep up with our latest articles, news and events. Plus, get special offers and more delivered to your inbox.

Like us
on Facebook Follow us
on Twitter

OphthalmologyWeb wants to hear from you. Submit your case studies, clinical pearls, practice management tips, editorial, or other manuscripts.

Learn more about writing for us