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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...
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Diagnostic Protocol for Accommodative and Vergence Anomalies - A Review.

Mousumi Saikia1, Kamal Pant2, Joydeep Dutta3

  • 1Department of Optometry and Vision Science, Amity Medical School, Amity University Haryana, Gurgaon, India.

Journal of Binocular Vision and Ocular Motility
|June 20, 2024
PubMed
Summary

Diagnostic protocols for non-strabismic binocular vision anomalies lack standardization, leading to varied results. Key signs like near point of convergence and accommodative facility show promise but require validated criteria for accurate diagnosis.

Keywords:
Accommodationbinocular dysfunctionsdiagnostic protocolvergence

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Area of Science:

  • Ophthalmology and Optometry
  • Vision Science
  • Clinical Diagnostics

Background:

  • Non-strabismic binocular vision anomalies (NSBVA) encompass a range of conditions affecting eye coordination and focus.
  • Current diagnostic approaches for NSBVA exhibit significant variability in methodologies and criteria.
  • Lack of standardized protocols hinders accurate prevalence estimation and clinical management of NSBVA.

Purpose of the Study:

  • To review and analyze the diagnostic protocols used for non-strabismic binocular vision anomalies.
  • To identify discrepancies and variability in current assessment methods for NSBVA.
  • To highlight the need for standardized and validated diagnostic criteria.

Main Methods:

  • A comprehensive literature search was conducted across major scientific databases (PubMed, ResearchGate, Google Scholar, MEDLINE).
  • Articles focusing on non-strabismic accommodative and vergence anomalies were selected for review.
  • Diagnostic criteria, normative data, and methodologies from selected studies were analyzed.

Main Results:

  • Significant discrepancies and variability were found in the diagnostic criteria and methodologies for NSBVA.
  • Near point of convergence (NPC) is commonly assessed, while vergence facility is less frequently used for convergence insufficiency.
  • Specific clinical signs like NPC (>10 cm) for convergence insufficiency, high positive relative accommodation (>3.50D) for accommodative excess, and low monocular accommodative facility (<7 CPM) for accommodative infacility showed diagnostic utility.

Conclusions:

  • There is a lack of standardized and diagnostically validated protocols for assessing NSBVA.
  • Variability in cutoff values and diagnostic criteria selection leads to discrepancies in prevalence rates.
  • Further research is needed to validate diagnostic criteria and standardize assessment protocols for all age groups to improve accuracy and consistency in diagnosing NSBVA.