3. Epithelium Provides Protection Provides a smooth surface so that nutrients and oxygen can transfer to the cornea. A lot of nerve endings
4. Bowman’s Membrane Composed of strong collagen tissue Helps to maintain the cornea’s shape Helps anchors down the epithelium
5. Stroma Contains mostly of water and protein The alignment of collagen fibers help the cornea retain its clarity.
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8. Corneal Topography 3D view of Cornea Aids in diagnosis various cornea conditions and disease Used in Laser Refractive Surgeries
9. K Readings Measures is Diopters K< 41D is consider flat K>46D is consider Steep K>41 but <46 is consider average Important in determining LASIK K readings are also used in IOL Master to calculate IOL’s
19. Keratoconus Abnormal Cornea condition where the cornea protrudes out more; Instead of a Dome like Figure, it becomes like a cone Distorts and reduces vision Usually bilaterally but asymmetrical Usually Myopic with large amounts of Irregular astigmatism No corneal refractive surgeries can be done As the cornea steepens, the cornea pachemtry gets thinner
23. How to take Topographies Have the patient sit at a comfortable level Inform the patient on what test you are doing Try to have a good tear film Let the patient know they cannot move doing this test
25. How to take Pachs with Ultrasound Always have pt look at a fixation point Carefully touch the central cornea with tip Try not to indent the cornea Always get a consistent reading
27. Keep in your head Consistency is the answer Knowing what is normal and abnormal Good tear film Being comfortable with the machine will make the patient more comfortable with you When in doubt always ask
