Association between ocular optical components and refractive errors in bank’s Employees of Sari, Iran

Abstract

Purpose To investigate the association between ocular optical components and refractive errors in bank’s employees of Sari, Iran Methods In this cross sectional study 398 bank’s employees of Sari, Iran were selected, 232 of them used the eyes for close work (computers, etc…) for a minimum of 7 hours per day for the 5 past years. The other 166 bank’s employees acted as a control group and did not did a close work more than one hour daily for the 5 past years. Age of the participants were between 25 to 40 years old. Axial length, anterior chamber depth, lens diameter and vitreous depth were measured with Nidek biometer. Corneal radius and non cycloplegic refraction performed with autorefracto‐keratometer; refractive errors were checked by retinoscopy and subjective tests. There was a high correlation between equivalent sphere (ES) right and left eyes of the subjects (0.9) and data of the right eye was analyzed. Data were analyzed by using version 19 of SPSS software. Results The results showed that the bank’s employees who had excessive use of the eyes for near work have more axial length (p<0.001), more anterior chamber depth (p=0.003) and more vitreous chamber depth (p<0.001) than the control group. There was no significant difference between lens diameter (p=0.525) and cornel radius (p=0.666) of the two groups. There was correlation between axial length and SE by increasing in axial length (p<0.000). The least amount correlation was found between lens diameter and ES (P< 0.000). Conclusion The results of this study indicated that ocular optical components changed toward myopia in people who had excessive close work.

The influence of variations in ocular biometric and optical parameters on differences in refractive error

“…However, as refractive errors are caused by a mismatch between these parameters, different correlations are found in each refractive group 5 . In particular, the influence of variations in axial length on refractive error has been clearly established, 6–8 but the importance of differences in corneal power, for example, is less clear, with some studies confirming 9–11 and others 12,13 not showing a significant influence. Similarly, while some reports have shown that the anterior chamber depth ( ACD ) is generally deeper in myopes than in hypermetropes, 10,11,14 other authors were unable to confirm this finding 15,16 .…”