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2. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   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.

3. List of optometric abbreviations - Wikipedia

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

   Right eye (oculus dexter) Ret. Retinoscopy RHyperT Right hypertropia RHypoT or RHT Right hypotropia RNFL Retinal nerve fibre layer RPE Retinal pigment epithelium RSOT Right esotropia Rx Prescription SE Spherical Equivalent: SLE Slit lamp examination SLM Slit lamp microscope EP Esophoria: ET Esotropia: Supp. Suppression V Vision (unaided) VA

4. Visual acuity - Wikipedia

   en.wikipedia.org/wiki/Visual_acuity

   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.

5. Prescription - Wikipedia

   en.wikipedia.org/wiki/Prescription

   Medical prescription, a plan of care written by a physician or other health care professional Prescription drug , a drug available only if prescribed by a medical prescription Eyeglass prescription , written by an ophthalmologist or an optometrist for individuals with eye related concerns.

6. Subjective refraction - Wikipedia

   en.wikipedia.org/wiki/Subjective_refraction

   An occluder is placed over the eye that is not being tested (e.g.: over the left eye, to test the right eye's vision). A pinhole occluder is then placed before the patient's eye, and their vision is then tested again (each eye separately) to determine if the patient's poor visual acuity is a result of optical irregularities, or pathological issues.

7. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   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)

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9. Vertex distance - Wikipedia

   en.wikipedia.org/wiki/Vertex_distance

   The phoropter measurement is made at a common vertex distance of 12 mm from the eye. 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: