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  2. Anisocoria - Wikipedia

    en.wikipedia.org/wiki/Anisocoria

    Prefix: aniso-from the Greek language (meaning unequal), which in turn comes from an: meaning not and iso meaning equal; Root: cor, from the Greek word korē meaning pupil of the eye; Suffix: -ia, which is a Latin suffix meaning a disease or a pathological or abnormal condition; Thus, anisocoria means the condition of unequal pupils.

  3. Physiological anisocoria - Wikipedia

    en.wikipedia.org/wiki/Physiological_anisocoria

    The main characteristic that distinguishes physiological anisocoria is an increase of pupil size with lower light or reduced illumination, such that the pupils differ in size between the two eyes. At any given eye examination, up to 41% of healthy patients can show an anisocoria of 0.4 mm or more at one time or another.

  4. Neurological pupil index - Wikipedia

    en.wikipedia.org/wiki/Neurological_Pupil_Index

    The Neurological Pupil index, or NPi, is an algorithm developed by NeurOptics, Inc., that removes subjectivity from the pupillary evaluation. A patient's pupil measurement (including variables such as size, latency, constriction velocity, dilation velocity, etc.) is obtained using a pupillometer, and the measurement is compared against a normative model of pupil reaction to light and ...

  5. Pupillary light reflex - Wikipedia

    en.wikipedia.org/wiki/Pupillary_light_reflex

    Whereas, the pupil is the passive opening formed by the active iris. Pupillary reflex is synonymous with pupillary response, which may be pupillary constriction or dilation. Pupillary reflex is conceptually linked to the side (left or right) of the reacting pupil, and not to the side from which light stimulation originates.

  6. Argyll Robertson pupil - Wikipedia

    en.wikipedia.org/wiki/Argyll_Robertson_pupil

    Argyll Robertson pupils (AR pupils) are bilateral small pupils that reduce in size on a near object (i.e., they accommodate), but do not constrict when exposed to bright light (i.e., they do not react). They are a highly specific sign of neurosyphilis; however, Argyll Robertson pupils may also be a sign of diabetic neuropathy.

  7. Pupil - Wikipedia

    en.wikipedia.org/wiki/Pupil

    For example, at the peak age of 15, the dark-adapted pupil can vary from 4 mm to 9 mm with different individuals. After 25 years of age, the average pupil size decreases, though not at a steady rate. [5] [6] At this stage the pupils do not remain completely still, therefore may lead to oscillation, which may intensify and become known as hippus ...

  8. List of optometric abbreviations - Wikipedia

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

    Pupils equal, round, reactive to light and accommodation PH Pinhole see Pinhole occluder and Visual_acuity#Legal_definitions: PHNI Pinhole No Improvement see Pinhole occluder and Visual_acuity#Legal_definitions: PHVA Pinhole Visual Acuity: PL Perception of light POH / PrOH Previous ocular history PPA Peri-papillary atrophy Pt Patient RAPD

  9. Stiles–Crawford effect - Wikipedia

    en.wikipedia.org/wiki/Stiles–Crawford_effect

    It was observed that the luminance of the pupil is not proportional to the pupil area. For instance, the luminance of a 30 mm 2 pupil was found to be only twice that of a 10 mm 2 pupil. In other words, to match the apparent brightness of light entering a 30 mm 2 pupil, the luminance of light entering through a 10 mm 2 pupil had to be increased ...