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Updated: Jul 18, 2026
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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
Published on: July 21, 2020
Visual field (Octopus 1-2-3) in normal subjects divided into homogeneous age-groups
Nassim Calixto1, Roberto Márcio de Oliveira Santos, Sebastião Cronemberger
1Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil. clinicacalixto@veloxmail.com.br
Arquivos Brasileiros De Oftalmologia
|December 26, 2006
Summary
This study establishes normal retinal sensitivity values for the Octopus 1-2-3 device across different age groups. Findings indicate sensitivity decreases with age and eccentricity, and results are not comparable to older Octopus models.
Area of Science:
- Ophthalmology and Visual Science
- Medical Device Technology
Background:
- Normal age-related retinal sensitivity values are crucial for early glaucoma detection.
- Previous studies utilized the Octopus 201, necessitating updated normative data for newer devices like the Octopus 1-2-3.
Purpose of the Study:
- To establish normative retinal sensitivity values (in decibels) within the central 26 degrees of the visual field for normal subjects using the Octopus 1-2-3.
- To compare these findings with existing normative data from the Octopus 201.
Main Methods:
- 181 healthy subjects were divided into six age-specific groups (10-19, 20-29, 30-39, 40-49, 50-59, 60+ years).
- Retinal sensitivity, age, and eccentricity data were collected and analyzed.
- Linear regression was used to determine correlations between sensitivity, age, and eccentricity.
Main Results:
- The overall average visual sensitivity was 26.77 ± 1.74 dB.
- A linear correlation was found between visual sensitivity and age (28.4 - 0.040 x age for the entire sample; 28.7 - 0.050 x age for subjects aged 20+).
- Retinal sensitivity decreased by 0.30 dB/degree with increasing eccentricity.
Conclusions:
- The normative data derived from the Octopus 1-2-3 differ significantly from those obtained with the Octopus 201.
- Direct comparison of retinal sensitivity values between the Octopus 1-2-3 and other Octopus models (101, 201, 500) is not recommended due to device-specific differences.
