1. CHAPTER 13
Samantha Loebbaka

2. XT
• XT is the abbreviation for Exotropia.
• Outward turning of the eye.
• Also called wall-eyed.
• Muscle weakness of the eye.

3. ST
• ST is the abbreviation for esotropia.
• Inward turning of eye.
• Also called cross-eyed.
• Muscle weakness of eye.

4. ASTIGM
• Astim is the abbreviation for astigmatism.
• Condition in which light rays are focused unevenly on the retina, causing a
distorted image, due to an abnormal curvature of the cornea.

5. EM
• EM is the abbreviation for emmetropia.
• State of normal vision.

6. MY
• My is the abbreviation for myopia.
• Nearsightedness
• Corrected with diverging or bicocnave lenses.
• Often squint or partially shut their eyes.

7. RK
• RK is the abbreviation for radial keratotomy.
• Spokelike incisions around the cornea that result in becoming flatter.
• A surgical treatment for myopia.

8. LASIK
• LASIK is the abbreviation for laser-assisted insitu keratomileusis.
• Laser surgery to remove corneal tissue.

9. OD
• OD is the abbreviation for right eye.

10. OS
• OS is the abbreviation for left eye.

11. PERRLA
• PERRLA is the abbreviation for pupils equal, round, react to light and
accommodation.