Axial length of the eyeball in ametropia in comparison to emmetropia by A-Scan: A cross sectional study
Journal Title: Medpulse International Journal of Physiology - Year 2017, Vol 4, Issue 3
Abstract
Background: Axial length is regarded as one of the primary determinants of refractive error. The correlation with refractive error is larger for axial length than for any other component. Objective: To study the axial length of the eyeball in ametropia in comparison to emmetropia. Material and Methodology: The present cross sectional study was carried out from October 2012 to September 2013 at Ophthalmology outpatient department, Regional eye hospital, Vishakapatnam. A study group of 150 cases divided into three groups by simple random sampling as emmetropes, myopes and hypermetropes in the age group of 10-30 years were included in the study. After taking informed consent the patient was enrolled into the study. A scan biometry using Appascan 2000 was done in all cases to know axial length. Results: The majority of patients in all groups were from age group 16-20 years with no gender difference. The axial length in emmetropes, myopes and hypermetropes was 23.60 ± 0.70 mm, 25.98 ± 1.00 mm and 21.58 ± 0.76 mm respectively. The mean axial length in the three groups was analyzed using ANOVA test and was found to be statistically significant (p< 0.05). Conclusion: Axial length is greater in myopic eyes as compared to that of hypermetropic eyes. The axial length is directly proportional to the degree of refractive error in myopic eyes and inversely proportional in hypermetropic eyes.
Authors and Affiliations
R Havilah Twinkle, G Parvathi
Keywords
Related Articles
- EP ID EP259177
- DOI -
- Views 244
- Downloads 0
Correlation between body fat distribution and pulmonary function tests
Obesity is a major public health challenge of the 21st century. Weight gain and rising BMI are associated with decreases in lung volumes, which are reflected by a more restrictive ventilatory pattern on spirometry. our a...
Cognitive status in hypothyroid patients before and after attainment of euthyroidstate: A prospective study at tertiary care centre
Background: Thyroid hormones have profound effects on the central nervous system and the consequences of overt hypothyroidism are well known. In contrast, there is less evidence regarding cognitive effects of subclinical...
25 hydroxy vitamin D status and cognitive impairment in the elderly among Indian population
Background: Cognitive function is a major determinant of quality of life in older age. The number of elderly subjects who will suffer from cognitive impairment and dementia will further increase in the near future.Cognit...
Association between television viewing and risk of metabolic syndrome, a community based study
Background: Metabolic syndrome, a constellation of interconnected physiological, biochemical, clinical, and metabolic factors that directly increase the risk of cardiovascular disease and type 2 diabetes mellitus is beco...
A comparative study of airway resistance, conductance and residual volume in first year MBBS day scholars and hostelites from rural areas of BMCRI
Background: Literature states that exposure to automobile pollution is a proposed marker for future development of acute or chronic respiratory disease. Hence the current study was undertaken with a view to investigate t...