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Using Retinal Imaging to Study Dementia

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Published on: November 6, 2017

Senescent changes of the normal visual field: an age-old problem.

P G Spry¹, C A Johnson

¹Discoveries in Sight, Devers Eye Institute, Portland, Oregon, USA. pgds@hotmail.com

Optometry and Vision Science : Official Publication of the American Academy of Optometry

|July 11, 2001

Summary

Normal aging significantly impacts visual field sensitivity, with a nonlinear function best describing the decline. Current linear corrections may misinterpret age-related changes, potentially leading to missed diagnoses in younger or older individuals.

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Area of Science:

Ophthalmology
Gerontology
Visual Neuroscience

Background:

Visual field sensitivity naturally declines with age.
Accurate characterization of this decline is crucial for diagnosing visual pathologies.
Existing clinical practices often rely on simplified age-correction models.

Purpose of the Study:

To investigate the relationship between normal aging and visual field sensitivity.
To determine the optimal mathematical function describing age-related changes in visual sensitivity.
To evaluate the impact of age on visual field sensitivity across different retinal locations.

Main Methods:

Retrospective analysis of standard automated perimetry data from 562 clinically normal eyes.
Application of linear, bilinear, and nonlinear functions to model mean sensitivity versus age.
Examination of age-related effects based on visual field eccentricity and hemifield.

Main Results:

A significant negative correlation was found between age and mean visual field sensitivity.
A nonlinear function provided the best fit (R²=0.26) for age-related sensitivity decline.
Age had a greater impact on sensitivity in peripheral and superior visual field regions.

Conclusions:

A nonlinear model better represents age-related visual field sensitivity loss than linear models.
Linear age corrections in clinical devices may lead to over- or underestimation of visual changes.
The findings necessitate re-evaluation of age-correction algorithms in visual field testing devices.