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Astigmatism prevalence and biometric analysis in normal population.
Gabor Nemeth1, Eszter Szalai, Andras Berta
1Department of Ophthalmology, Medical and Health Science Center, University of Debrecen, Debrecen - Hungary. nemeth222@yahoo.com
European Journal of Ophthalmology
|May 4, 2013
Summary
Corneal astigmatism magnitude and orientation change with age, particularly an against-the-rule shift. Over 32% of adults have astigmatism >1.0 D, impacting refractive outcomes in cataract surgery.
Area of Science:
- Ophthalmology
- Optometry
- Biomedical Engineering
Background:
- Corneal astigmatism is a significant factor influencing visual acuity.
- Understanding age-related changes in corneal astigmatism and its biometric correlations is crucial for ophthalmic practice.
Purpose of the Study:
- To investigate the magnitude, orientation, and age-related variations of corneal astigmatism.
- To analyze the correlation between corneal astigmatism and ocular biometric parameters in healthy individuals.
Main Methods:
- Analysis of 1092 eyes from healthy individuals aged 15 years and above.
- Exclusion of participants with prior ocular surgery, corneal disease, or contact lens use.
- Assessment of axial length (AL), keratometric readings, and anterior chamber depth (ACD) using IOLMaster.
Main Results:
- Mean age of participants was 69.64 ± 15.25 years.
- Overall astigmatism was 0.89 ± 0.72 D, with 32.78% of eyes having astigmatism ≥1.0 D.
- A significant age-related shift towards against-the-rule astigmatism was observed, alongside correlations between age, AL, ACD, and keratometry.
Conclusions:
- Ophthalmologic biometric parameters and astigmatism >1.0 D require careful consideration during cataract surgery due to their dynamic nature.
- Age-related changes in ocular biometry and astigmatism underscore the need for personalized refractive strategies.