Stereopsis in patients with refractive accommodative esotropia
Haeng Jin Lee1, Seong-Joon Kim2, Young Suk Yu2
1Department of Ophthalmology, Seoul National University College of Medicine, Seoul, South Korea.
Summary
Refractive error and angle of deviation impact stereopsis in accommodative esotropia. Achieving good stereopsis requires a small deviation, under 4 prism diopters at distance and 5 at near.
Area of Science:
- Ophthalmology
- Vision Science
Background:
- Refractive accommodative esotropia is a common form of strabismus in children.
- Stereopsis, the ability to perceive depth, is crucial for visual function.
Purpose of the Study:
- To identify factors influencing stereopsis in patients with refractive accommodative esotropia.
- To determine the threshold for achieving good stereopsis in this patient group.
Main Methods:
- Retrospective analysis of 85 patients with refractive accommodative esotropia.
- Evaluation of refractive error, angle of deviation, and stereopsis.
- Comparison of parameters between good and poor stereopsis groups.
Main Results:
- Lower initial refractive error and smaller deviation angles were associated with better stereopsis.
- Orthotropia at distance and near correlated with superior stereopsis.
- Deviations exceeding 4 prism diopters (distance) or 5 prism diopters (near) resulted in poor or absent stereopsis.
Conclusions:
- Refractive error, angle of deviation, and fusional ability are key factors affecting stereopsis.
- Optimal stereopsis in refractive accommodative esotropia is likely limited to deviations of ≤4 prism diopters (distance) and ≤5 prism diopters (near).
Related Concept Videos
01:28Angle Closure Glaucoma: Treatment
1.4K
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
1.4K
01:27Open Angle Glaucoma: Treatment
1.1K
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
1.1K
01:16Focusing of Light in the Eye
6.7K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
6.7K