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Objective excyclotorsion increases with aging in adults.

Akihiko Oohira¹

¹Department of ophthalmology, Wakaba Eye Hospital, Tokyo.

|September 27, 2022

Summary

The disc-fovea angle (DFA), a measure of eye cyclotorsion, increases with age. This study found that DFA is larger in females, the left eye, and the non-dominant eye.

Area of Science:

Ophthalmology
Optometry
Vision Science

Background:

The disc-fovea angle (DFA) objectively measures cyclotorsion.
Previous reports suggest DFA increases with age.

Purpose of the Study:

To investigate the effects of age, sex, and eye laterality on DFA.
To quantify age-related changes in cyclotorsion.

Main Methods:

Retrospective analysis of fundus photographs from 249 participants (aged 44-81 years).
Exclusion criteria included poor visual acuity, high axial length, strabismus, and fusion-affecting ocular diseases.
DFA measured using digital fundus photography; total DFA calculated as the sum of right and left eye DFAs.

Main Results:

Keywords:

Aging Disc-Fovea angle (DFA)Laterality Objective cyclotorsion Sex

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Older adults (Group III, ~81 years) showed significantly larger left-eye and total DFA compared to younger adults (Group I, ~44 years).

Female participants exhibited significantly larger total DFA than males.

The left eye had a significantly larger DFA than the right eye.

DFA was significantly larger in the non-dominant eye compared to the dominant eye.

Conclusions:

DFA shows a slight but significant increase with age.
Female sex and left-eye dominance are associated with larger DFA.
Cyclotorsion, as measured by DFA, is influenced by age, sex, and eye dominance.