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Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

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Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes
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Anterior segment changes with age and during accommodation measured with partial coherence interferometry.

Alexis Tsorbatzoglou1, Gábor Németh, Noémi Széll

  • 1Department of Ophthalmology, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary. alex@dote.hu

Journal of Cataract and Refractive Surgery
|August 28, 2007
PubMed
Summary

Accommodation amplitude decreases with age, with significant changes in anterior segment length, lens thickness, and anterior chamber depth. These age-related alterations influence the accommodative response.

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Automated Compression Testing of the Ocular Lens
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Automated Compression Testing of the Ocular Lens

Published on: April 5, 2024

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Last Updated: Jul 12, 2026

Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes
08:27

Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes

Published on: March 3, 2023

Automated Compression Testing of the Ocular Lens
05:19

Automated Compression Testing of the Ocular Lens

Published on: April 5, 2024

Area of Science:

  • Ophthalmology
  • Optometry
  • Biomedical Engineering

Background:

  • Aging leads to progressive changes in the anterior segment of the eye.
  • Understanding these changes is crucial for diagnosing and managing age-related visual impairments.

Purpose of the Study:

  • To evaluate age-related alterations in the anterior segment.
  • To assess changes in anterior segment parameters during accommodation across different age groups.

Main Methods:

  • Partial coherence interferometry was used to measure anterior segment parameters.
  • Subjects were divided into three age groups: <30, 31-44, and >45 years.
  • Total amplitude of accommodation was determined using a defocusing technique.

Main Results:

  • Accommodation amplitude significantly decreased with age (P<.0001).
  • Lens thickness and anterior segment length increased, while anterior chamber depth decreased with age (P<.0001).
  • Accommodation-induced changes in anterior chamber depth and lens thickness varied significantly across age groups (P<.0001).

Conclusions:

  • Age-related changes include forward movement of the anterior lens surface and backward movement of the posterior surface.
  • The magnitude of lens thickness and anterior chamber depth alterations during accommodation may be smaller than previously assumed.
  • Anterior lens shifting might play a role in the accommodative response.