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In paralysis of accommodation, amplitude of accommodation is either markedly reduced or completely absent (cycloplegia). [4] It may occur due to ciliary muscle paralysis or oculomotor nerve paralysis. [1] Parasypatholytic drugs like atropine will also cause paralysis of accommodation. [3]
In ophthalmology, accommodative excess (also known as excessive accommodation or accommodation excess) occurs when an individual uses more than normal accommodation (focusing on close objects) for performing certain near work. Accommodative excess has traditionally been defined as accommodation that is persistently higher than expected for the ...
A spasm of accommodation (also known as a ciliary spasm, an accommodation, or accommodative spasm) is a condition in which the ciliary muscle of the eye remains in a constant state of contraction. Normal accommodation allows the eye to "accommodate" for near-vision. However, in a state of perpetual contraction, the ciliary muscle cannot relax ...
In paralysis of accommodation, amplitude of accommodation is either markedly reduced or completely absent (cycloplegia). [52] It may occur due to ciliary muscle paralysis or occulomotor nerve paralysis. [50] Parasympatholytic drugs like atropine will also cause paralysis of accommodation. [51]
Accommodative infacility also known as accommodative inertia [1] is the inability to change the accommodation of the eye with enough speed and accuracy to achieve normal function. This can result in visual fatigue, headaches, and difficulty reading. [2]
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The vergence-accommodation conflict can have permanent effects on eyesight. Children under the age of six are recommended to avoid 3D displays that cause VAC. [12] Meta Half Dome prototypes addressed the problem with variable focus lenses that matched focal depth to vergence stereoscopic depth. [15]
However, errors in this relationship can cause problems, such as hyperopic individuals having a tendency for crossed eyes because of the over exertion of their accommodation system. Clinically, accommodative convergence is measured as a ratio of convergence, measured in prism diopters, to accommodation, measured in diopters of near demand.