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Esotropia is sometimes erroneously called "lazy eye", which describes the condition of amblyopia; a reduction in vision of one or both eyes that is not the result of any pathology of the eye and cannot be resolved by the use of corrective lenses.
Amblyopia has three main causes: Strabismic: by strabismus (misaligned eyes) Refractive: by anisometropia (difference of a certain degree of nearsightedness, farsightedness, or astigmatism ), or by significant amount of equal refractive error in both eyes.
Esotropia. In an Esotropic (ET) deviation, the patient will experience uncrossed diplopia. When questioned about the position of the lights, they will report that: They see 5 lights, 2 red and 3 green; The lights are horizontally displaced, seen side by side; The 2 red lights from the right eye are seen on the right side
This occurs with the interest of finding better visual acuity, however all patients found with eccentric fixation have amblyopia, suppression, anisometropia and poorer stereopsis. Eccentric fixation utilises an abnormal retinal correspondence point and not the fovea, no movement under the prism is seen when placed over the deviated eye as the ...
Amblyopia, double vision: Types: Esotropia (eyes crossed); exotropia (eyes diverge); hypertropia (eyes vertically misaligned) Causes: Muscle dysfunction, farsightedness, problems in the brain, trauma, infections: Risk factors: Premature birth, cerebral palsy, family history: Diagnostic method: Observing light reflected from the pupil
Ophthalmology Optometry. Monofixation syndrome ( MFS) (also: microtropia or microstrabismus) is an eye condition defined by less-than-perfect binocular vision. [1] It is defined by a small angle deviation with suppression of the deviated eye and the presence of binocular peripheral fusion. [2]
The unilateral cover test is performed by having the patient focus on an object then covering the fixating eye and observing the movement of the other eye. If the eye was exotropic, covering the fixating eye will cause an inwards movement; and if esotropic, covering the fixating eye will cause an outwards movement.
Amblyopia will be treated via occlusion treatment (using patching or atropine drops) of the non-squinting eye with the aim of achieving full alternation of fixation. Management thereafter will be surgical. As alternative to surgery, also botulinum toxin therapy has been used in children with infantile esotropia.
Causes include: Refractive errors. Divergence insufficiency. Convergence excess; this can be due to nerve, muscle, congenital or mechanical anomalies. [1] Unlike esotropia, fusion is possible and therefore diplopia is uncommon.
Suppression is frequent in children with anisometropia or strabismus or both. For instance, children with infantile esotropia may alternate with which eye they look, each time suppressing vision in the other eye.
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