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Correlation between ocular parameters and amplitude of accommodation.
Lekha Mary Abraham1, Thomas Kuriakose, Viswanathan Sivanandam
1Department of Ophthalmology, Christian Medical College, Vellore, India. lekhaabraham@yahoo.com
Indian Journal of Ophthalmology
|October 19, 2010
Summary
Ocular parameters like axial length and anterior chamber depth showed moderate correlation with amplitude of accommodation in young myopes. However, no significant correlation was found overall in the peri-presbyopic age group.
Area of Science:
- Ophthalmology
- Optometry
Background:
- Presbyopia affects individuals aged 35-50, impacting near vision.
- Understanding ocular parameters influencing accommodation is crucial for managing visual changes.
Purpose of the Study:
- To investigate the relationship between ocular parameters (axial length, anterior chamber depth, lens thickness) and amplitude of accommodation (AA) in the peri-presbyopic age group (35-50 years).
Main Methods:
- A study of 316 right eyes from patients aged 35-50 with best-corrected visual acuity of 20/20, J1.
- Amplitude of accommodation (AA) measured via near point of accommodation.
- Ocular parameters including axial length (AL), central anterior chamber depth (CACD), and lens thickness (LT) were measured.
Main Results:
- Moderate correlation (r=0.56) between AL and AA, and (r=0.53) between CACD and AA observed in myopes aged 35-39.
- No significant correlation found between AL, CACD, and AA in other age groups or overall.
- No significant correlation between LT and AA across different age groups and refractive errors.
Conclusions:
- No significant correlation exists between amplitude of accommodation and ocular parameters such as anterior chamber depth, axial length, and lens thickness in the peri-presbyopic population.
- Specific correlations were noted only in a subgroup of younger myopes.
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