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Updated: May 24, 2026
05:54
Eye-tracking to Distinguish Comprehension-based and Oculomotor-based Regressive Eye Movements During Reading
Published on: October 18, 2018
Does ethnicity influence the short-term adaptation to first reading correction?
Indu Vedamurthy1, Meng Lin, Jianliang Tong
1Brain & Cognitive Sciences, University of Rochester, Rochester, New York 14627-0268, USA. ivedamurthy@bcs.rochester.edu
Summary
Ethnicity does not influence how the eye adapts to new reading glasses. Initial use of reading spectacles caused a temporary decrease in accommodative amplitude (AA) in both Chinese and Caucasian individuals.
Area of Science:
- Ophthalmology
- Optometry
- Vision Science
Background:
- Ethnic variations in accommodative amplitude (AA) are recognized.
- The impact of initial near spectacle wear on AA adaptation is not fully understood, particularly concerning ethnic differences.
Purpose of the Study:
- To investigate the influence of ethnicity on changes in accommodative amplitude (AA) and convergence cross-link interactions.
- To assess the adaptation of accommodation and vergence to first-time near spectacle wear in Chinese and Caucasian incipient presbyopes.
Main Methods:
- Forty-one subjects (22 Caucasians, 19 Chinese) aged 36-44 years participated.
- Measurements included accommodative stimulus response function, AA, AC/A, and CA/C ratios before, during (2 months), and after (2 months) near spectacle wear.
- Analysis focused on changes in these parameters and their ethnic variations.
Main Results:
- Accommodative stimulus response slopes and AC/A, CA/C ratios remained stable across ethnicities.
- A significant decrease in AA (0.52 D) was observed after 2 months of spectacle wear, with recovery after discontinuation.
- No significant ethnic differences were found in adaptation, though baseline AA vs. age slopes differed between groups.
Conclusions:
- The adaptation of accommodation and vergence cross-link interactions to short-term, first-time near spectacle wear is not influenced by ethnicity.
- Initial near spectacle wear induces a temporary, ethnicity-independent reduction in accommodative amplitude.
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