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Related Concept Videos

Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Glaucoma: Overview01:25

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

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...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

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...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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...

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Related Experiment Video

Updated: Jul 17, 2026

Modeling Cataract Surgery in Mice
05:19

Modeling Cataract Surgery in Mice

Published on: December 1, 2023

[Senile cataract and strabismus].

Maciej Gawecki1, Janusz Adamski, Jacek Rydzewski

  • 1Oddziału Okulistycznego Szpitala Wojewódzkiego w Elblagu.

Klinika Oczna
|February 13, 2007
PubMed
Summary

Sensory deprivation from cataracts can cause strabismus (eye deviation). However, cataract surgery often restores normal eye alignment and binocular vision, indicating binocularity is usually preserved.

Area of Science:

  • Ophthalmology
  • Neuroscience

Context:

  • Senile cataract can lead to sensory deprivation.
  • This deprivation can cause strabismus (misalignment of the eyes).

Purpose:

  • To determine if sensory deprivation from cataracts causes a loss of binocularity.
  • To evaluate the impact of cataract surgery on strabismus and binocular vision.

Summary:

  • 26 patients with cataract-induced strabismus underwent phacoemulsification with intraocular lens (IOL) implantation.
  • Pre-surgery exodeviation ranged from -10 to -40 degrees with poor visual acuity.
  • Post-surgery, 19 patients achieved orthotopic alignment; 18 of 21 orthotopic patients (86%) regained stereopsis.

Impact:

  • Cataract-induced sensory deprivation can cause exodeviation.

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  • Cataract surgery is effective in correcting strabismus and restoring binocularity in most cases.
  • This suggests binocularity is often preserved despite prolonged visual deprivation.