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  2. Snellen chart - Wikipedia

    en.wikipedia.org/wiki/Snellen_chart

    Snellen chart. Purpose. Snellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10) A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula ...

  3. Eye chart - Wikipedia

    en.wikipedia.org/wiki/Eye_chart

    Landolt C. Lea test. logMAR 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.

  4. List of optometric abbreviations - Wikipedia

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

    Description ( notes ) AC. Anterior chamber. fluid-filled space between the iris and the endothelium. AC 4/4. Grade 4 anterior chamber angle. open angle between cornea and iris. AC 3/4. Grade 3 anterior chamber angle.

  5. Humphrey visual field analyser - Wikipedia

    en.wikipedia.org/wiki/Humphrey_Visual_Field_Analyser

    Humphrey field analyser ( HFA) is a tool for measuring the human visual field that is commonly used by optometrists, orthoptists and ophthalmologists, particularly for detecting monocular visual field. [1] The results of the analyser identify the type of vision defect. Therefore, it provides information regarding the location of any disease ...

  6. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    Eye examination for visual acuity. Visual acuity is a measure of the spatial resolution of the visual processing system. VA, as it is sometimes referred to by optical professionals, is tested by requiring the person whose vision is being tested to identify so-called optotypes – stylized letters, Landolt rings, pediatric symbols, symbols for the illiterate, standardized Cyrillic letters in ...

  7. Eye examination - Wikipedia

    en.wikipedia.org/wiki/Eye_examination

    29271-4. An eye examination, commonly known as an eye test [1], is a series of tests performed to assess vision and ability to focus on and discern objects. It also includes other tests and examinations pertaining to the eyes. Eye examinations are primarily performed by an optometrist, ophthalmologist, or an orthoptist .

  8. National Council Licensure Examination - Wikipedia

    en.wikipedia.org/wiki/National_Council_Licensure...

    The National Council Licensure Examination ( NCLEX) is a nationwide examination for the licensing of nurses in the United States, Canada, and Australia since 1982, 2015, and 2020, respectively. [ 2 ][ 3 ] There are two types: the NCLEX-RN and the NCLEX-PN. After graduating from a school of nursing, one takes the NCLEX exam to receive a nursing ...

  9. Landolt C - Wikipedia

    en.wikipedia.org/wiki/Landolt_C

    The Landolt C, also known as a Landolt ring, Landolt broken ring, or Japanese vision test, is an optotype: a standardized symbol used for testing vision. It was developed by the Swiss-born ophthalmologist Edmund Landolt . The Landolt C consists of a ring that has a gap, thus looking similar to the letter C. The gap can be at various positions ...

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