AIM: To evaluate the clinical effectiveness of intrastromal corneal ring segments among the patients suffering from keratoconus.

METHODS: A retrospective and comparative interventional design had been utilized on the basis of postoperative follow up among 56 keratoconus patients. Visual acuity was significantly assessed during complete ophthalmic examination of the patients. The femtosecond laser had been used to create the corneal tunnels in 15 eyes; whereas, the corneal tunnels were created in 72 eyes mechanically.

RESULTS: The ranges and standard deviations had been used to obtain results. It had been revealed through ophthalmic assessment that the mean preoperative uncorrected visual acuity observed was 1.38±0.37 Logarithm of Minimal Angle of Resolution. Moreover, a significant improvement was observed postoperatively in visual acuity by 0.58±0.32 during the fourth month. The improvement was also witnessed in the 16^th month by 0.48±0.30.

CONCLUSION: The implantation of intrastromal corneal ring segments is an efficient and effective surgical intervention for the treatment of keratoconus. Thus, identified intervention seems to be associated with appropriate visual outcomes and safety after the development of femtosecond as well as mechanical tunnels.