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2. Accommodation reflex - Wikipedia

   en.wikipedia.org/wiki/Accommodation_reflex

   Light from a single point of a distant object and light from a single point of a near object being brought to a focus. The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.

3. Accommodative insufficiency - Wikipedia

   en.wikipedia.org/wiki/Accommodative_insufficiency

   Differential diagnosis. Convergence insufficiency. Accommodative insufficiency ( AI) involves the inability of the eye to focus properly on an object. Accommodation is the adjustment of the curvature of the lens to focus on objects near and far. In this condition, amplitude of accommodation of a person is lesser compared to physiological limits ...

4. Convergence insufficiency - Wikipedia

   en.wikipedia.org/wiki/Convergence_insufficiency

   Diagnosis of convergence insufficiency is made by an eye care professional skilled in binocular vision dysfunctions, such as an optometrist, ophthalmologist, or orthoptist to rule out any organic disease. Convergence insufficiency is characterized by one or more of the following diagnostic findings: patient symptoms, high exophoria at near ...

5. 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.

6. Accommodation (vertebrate eye) - Wikipedia

   en.wikipedia.org/wiki/Accommodation_(vertebrate_eye)

   The 1 cm spaced grid indicates a near focus focal length of around 6cm. Accommodation is the process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies. In this, distances vary for individuals from the far point —the maximum distance from the eye for which a clear image of ...

7. Pupillary reflex - Wikipedia

   en.wikipedia.org/wiki/Pupillary_reflex

   In "the near response" there are three processes that occur to focus an image on the retina. Convergence of the eyes, or the orientation of the visual axis of each eye towards an object in order to focus its image on each fovea, is the first of the three responses. This can be observed by the cross-eyed movement of the eyes when a finger is ...

8. Vergence-accommodation conflict - Wikipedia

   en.wikipedia.org/wiki/Vergence-accommodation...

   Vergence-accommodation conflict ( VAC ), also known as accommodation-vergence conflict, is a visual phenomenon that occurs when the brain receives mismatching cues between vergence and accommodation of the eye. This commonly occurs in virtual reality devices, augmented reality devices, 3D movies, and other types of stereoscopic displays and ...

9. Vestibulo–ocular reflex - Wikipedia

   en.wikipedia.org/wiki/Vestibulo–ocular_reflex

   The result is a compensatory movement of the eyes. The vestibulo-ocular reflex ( VOR) is a reflex that acts to stabilize gaze during head movement, with eye movement due to activation of the vestibular system, it is also known as the Cervico-ocular reflex. The reflex acts to stabilize images on the retinas of the eye during head movement.