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Title: The outcomes of refractive eye surgery
Author: McAlinden, Colm
ISNI:       0000 0004 2718 7856
Awarding Body: University of Ulster
Current Institution: Ulster University
Date of Award: 2010
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Introduction: This PhO study investigates finite objective and subjective clinical outcomes of refractive surgery. Methods: A series of studies was conducted to investigate laser retreatment procedures, a comparison between the OPO-Scan and WaveScan aberrometers, a comparison of aberrometry changes following laser in situ keratomileusis (LASIK) and laser-assisted subepithelial keratectomy (LASEK), internal aberration changes following LASIK, the development of a quality of vision (OoV) questionnaire and the refractive outcomes of the SCHWINO Amaris excimer laser. Results: Good visual and refractive outcomes were found with LASEK retreatment and a high incidence (23%) of epithelial ingrowth occurred following flap-lift LASIK retreatments. In the comparison between the OPO-Scan and WaveScan, medium consistency was found for aberrations z;' and z~ with poor consistency for all other aberrations. In the comparison between LASIK and LASEK, both procedures caused increases to spherical aberration with LASIK additionally causing increases to two fourth-order aberrations and LASEK causing increases to two fifth-order aberrations. Investigations into internal aberrations found LASIK increased internal spherical aberration which attenuated the increase in anterior corneal spherical aberration. A OoV questionnaire was successfully developed utilising Rasch analysis demonstrating good precision, reliability, and internal consistency with good construct validity and test-retest reliability. The SCHWINO Amaris was found to be effective for the treatment of a range of refractive errors. Conclusion: Significant clinical finding were found for laser retreatments and primary treatments with two different laser systems. Aberrations were found to be poorly correlated with the OPO-Scan and the WaveScan. An effective OoV questionnaire was developed which may be used in prospective clinical and research studies. •.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available