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An eyeglass prescription. Similar to medical prescriptions, eyeglass prescriptions are written on paper pads or included in a patient's electronic health record, and contain a number of different abbreviations and terms: DV is an abbreviation for distance vision. This specifies the part of the prescription designed primarily to improve far vision.
Abbrev. [1]Meaning [1] Latin (or Neo-Latin) origin [1]; a.c. before meals: a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte every night ...
oculus sinister (left eye) LHyperT or LHT: Left hypertropia LHypoT: Left hypotropia LO: Lenticular opacity L/R FD: L/R fixation disparity L/R: L hyperphoria Left ET: Left esotropia LVA: Low vision aid MDU: Mallett distance unit MNU: Mallett near unit M.Wing: Maddox Wing: MR: Maddox rod NB: NAD: No abnormality detected (is frequently used but is ...
left eye o can be mistaken as an a which could read "a.s.", meaning left ear o.u. oculus uterque: both eyes o can be mistaken as an a which could read "a.u.", meaning both ears oz ounce p. perstetur: continue part. æq. partes æquales: equal parts per: per: by or through p.c. post cibum: after meals p.c.h.s., pc&hs post cibum et hora somni
The eye's Abbe number is independent of the importance of the corrective lens's Abbe, since the human eye: Moves to keep the visual axis close to its achromatic axis, which is completely free of dispersion (i.e., to see the dispersion one would have to concentrate on points in the periphery of vision, where visual clarity is quite poor)
Acuity is a measure of visual performance and does not relate to the eyeglass prescription required to correct vision. Instead, an eye exam seeks to find the prescription that will provide the best corrected visual performance achievable. The resulting acuity may be greater or less than 6/6 = 1.0.
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