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2. Eye chart - Wikipedia

   en.wikipedia.org/wiki/Eye_chart

   An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [ 1 ] Eye charts are often used by health care professionals, such as optometrists , physicians and nurses , to screen persons for vision impairment .

3. List of optometric abbreviations - Wikipedia

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

   Visual acuity with Distant chart with correctors Visual acuity with eye chart at Distant 20 feet (6 m) and with (cc: Latin cum correctore) correctors (spectacles); Dsc is without (sc: Latin sine correctore) correctors. See Visual_acuity#Legal_definitions: VA Nsc - VA Ncc Visual acuity with Near chart without correctors

4. Cataract - Wikipedia

   en.wikipedia.org/wiki/Cataract

   An immature cataract has some transparent protein, but with a mature cataract, all the lens protein is opaque. In a hypermature or Morgagnian cataract, the lens proteins have become liquid. Congenital cataract, which may be detected in adulthood, has a different classification and includes lamellar, polar, and sutural cataracts. [50] [51]

5. Snellen chart - Wikipedia

   en.wikipedia.org/wiki/Snellen_chart

   Some clinics do not have 6-metre eye lanes available, and either a half-size chart subtending the same angles at 3 metres (9.8 ft), or a reversed chart projected and viewed by a mirror is used to achieve the correct sized letters. In the most familiar acuity test, a Snellen chart is placed at a standard distance: 6 metres.

6. List of instruments used in ophthalmology - Wikipedia

   en.wikipedia.org/wiki/List_of_instruments_used...

   •von Graefe's cataract knife: cutting out of the anterior chamber from the inside through the limbus •Tookes' knife (Sclero-corneal splitter) making sclerocorneal tunnels in "small incision cataract surgery (SICS)" and keratoplasty •Crescent knife (Sclero-corneal splitter) making sclerocorneal tunnels in "small incision cataract surgery"

7. Intraocular lens power calculation - Wikipedia

   en.wikipedia.org/wiki/Intraocular_lens_power...

   The aim of an accurate intraocular lens power calculation is to provide an intraocular lens (IOL) that fits the specific needs and desires of the individual patient. The development of better instrumentation for measuring the eye's axial length (AL) and the use of more precise mathematical formulas to perform the appropriate calculations have significantly improved the accuracy with which the ...

8. Pinhole occluder - Wikipedia

   en.wikipedia.org/wiki/Pinhole_occluder

   Print/export Download as PDF; ... evaluate potential visual acuity in cataract etc. [1] Test of: ... Differential diagnosis: pinhole worsen vision: ...

9. Phacomorphic glaucoma - Wikipedia

   en.wikipedia.org/wiki/Phacomorphic_glaucoma

   Phacomorphic glaucoma is an eye disease that can occur due to a neglected advanced cataract.In this, the mature cataractous lens cause secondary angle closure glaucoma.The presence of an asymmetric mature cataractous lens, shallow or closed anterior chamber angle, raised intraocular pressure (IOP) and other typical signs and symptoms of angle-closure glaucoma in the eye may lead to a diagnosis ...