| OMT | object modeling technique; ocular microtremor; O-methyltransferase; ophthalmic medical technician or... |
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| OPDG | ocular plethysmodynamography |
| OPG | ocular pneumoplethysmography; orthopantomogram; oxypolygelatin |
| OT | objective test; oblique talus; occlusion time; occupational therapist, occupational therapy; ocular ... |
| POHS | presumed ocular histoplasmosis syndrome |
| fixational ocular movement | Rotation of the eyes during voluntary fixation on an object; tremors, flicks, and drifts occur. (05 Mar 2000) |
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| fixation, ocular | The direction of the gaze so that the visual image of the object falls on the fovea centralis of the retina, the area of the most acute vision. (12 Dec 1998) |
| Frenkel's anterior ocular traumatic syndrome | <syndrome> An obsolete term for traumatic iridoplegia, which consists of mydriasis, hyphema, small iris tears near the pupil, discrete punctate opacities of the lens, and occasionally iridodialysis. (05 Mar 2000) |