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2. List of optometric abbreviations - Wikipedia

   en.wikipedia.org/wiki/List_of_optometric...

   AC 1/4: Grade 1 anterior chamber angle: AC 0/4: Grade 0 anterior chamber angle: closed angle between cornea and iris AC/A: Accommodative convergence / Accommodation ratio the portion of the range of convergence that occurs in response to accommodation: Acc: Accommodation: process of changing optical power to maintain focus as distance changes ...

3. List of abbreviations used in medical prescriptions - Wikipedia

   en.wikipedia.org/wiki/List_of_abbreviations_used...

   q.1 h, q.1° quaque 1 hora: every 1 hour (can replace 1 with other numbers) q4PM at 4:00 pm (can replace 4 with other numbers) mistaken to mean every 4 hours q.a.d. quaque alternis die: every other day q.a.m. quaque die ante meridiem: every morning (every day before noon) q.d./q.1.d. quaque die: every day

4. List of medical abbreviations: Latin abbreviations - Wikipedia

   en.wikipedia.org/wiki/List_of_medical...

   [1] Meaning [1] Latin (or Neo-Latin) origin [1] a.c. before meals: ante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte every night Omne Nocte a.s., as, AS left ear auris sinistra a.u., au, AU both ears together or each ear aures unitas or auris uterque b.d.s, bds, BDS 2 times a day bis die sumendum b.i.d ...

5. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   A prescription of −1.00 +0.25 × 180 describes a lens that has a horizontal power of −1.00 D and a vertical power of −0.75 D. Only ophthalmologists write prescriptions in + cylinder. An optometrist would write a prescription in - (minus) cylinder. All spectacle and contact lenses would be made in minus cylinder.

6. Effects of long-term contact lens wear on the cornea - Wikipedia

   en.wikipedia.org/wiki/Effects_of_long-term...

   Layers of the Cornea (1) Epithelium (2) Anterior elastic lamina (3) Substantia propria (4) Posterior elastic lamina (5) Endothelium of the anterior chamber Disposable, soft contact lenses. Keratitis, or an inflammation of the cornea. The effects of extended contact lens wear on the cornea have been studied extensively and are well-documented.

7. Vertex distance - Wikipedia

   en.wikipedia.org/wiki/Vertex_distance

   The equivalent prescription at the patient's cornea (say, for a contact lens) can be calculated as follows (this example assumes a negative cylinder sign convention): Power 1 is the spherical value, and power 2 is the steeper power of the astigmatic axis: