H Hemichordate Peds 15+ Year Member Feb 23, 2013 #1 Advertisement - Members don't see this ad When you have a notation, say MRD, with two arrows, one going to a number on top and one going to a number below that, does the top number indicate OD and the lower number indicate OS?
Advertisement - Members don't see this ad When you have a notation, say MRD, with two arrows, one going to a number on top and one going to a number below that, does the top number indicate OD and the lower number indicate OS?
M MstaKing10 Full Member 15+ Year Member Feb 23, 2013 #2 usually the upper number refers to the right eye (OD) and the lower to the left eye (OS).
G guttata Member 7+ Year Member 15+ Year Member Feb 23, 2013 #3 If you see it written twice (once for each eye), it could represent MRD1 and MRD2. MRD1 is the distance from the upper eyelid margin to the pupillary center. MRD2 is the distance from the lower eyelid margin to the pupillary center.
If you see it written twice (once for each eye), it could represent MRD1 and MRD2. MRD1 is the distance from the upper eyelid margin to the pupillary center. MRD2 is the distance from the lower eyelid margin to the pupillary center.
