Amplitude of accommodation and its relation to refractive errors.
Indian J Ophthalmol
;
2005 Jun; 53(2): 105-8
Article
in English
| IMSEAR
| ID: sea-72126
ABSTRACT
AIMS:
To evaluate the relationship between amplitude of accommodation and refractive errors in the peri-presbyopic age group. MATERIALS ANDMETHODS:
Three hundred and sixteen right eyes of 316 consecutive patients in the age group 35-50 years who attended our outpatient clinic were studied. Emmetropes, hypermetropes and myopes with best-corrected visual acuity of 6/6 J1 in both eyes were included. The amplitude of accommodation (AA) was calculated by measuring the near point of accommodation (NPA). In patients with more than +/- 2 diopter sphere correction for distance, the NPA was also measured using appropriate soft contact lenses.RESULTS:
There was a statistically significant difference in AA between myopes and hypermetropes (P < 0.005) and between myopes and emmetropes (P < 0.005) in the 35-39 year age group. In the 40-44 year age group, there was a significant difference in AA between emmetropes and hypermetropes (P < 0.0001), emmetropes and myopes (P < 0.01) and hypermetropes and myopes (P < 0.0001). In patients above 45 years of age there was no significant difference (P > 0.5).CONCLUSION:
Our study showed higher amplitude of accommodation among myopes between 35 and 44 years compared to emmetropes and hypermetropes.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Presbyopia
/
Humans
/
Visual Acuity
/
Cross-Sectional Studies
/
Adult
/
Accommodation, Ocular
/
Hyperopia
/
Middle Aged
/
Myopia
Type of study:
Observational study
/
Prevalence study
/
Risk factors
Language:
English
Journal:
Indian J Ophthalmol
Year:
2005
Type:
Article
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