SciELO - Scientific Electronic Library Online

vol.67 issue3Ultraviolet filter effect on hydrophilic high hydrated contact lensesRetinal peripheral changes after LASIK author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista Brasileira de Oftalmologia

Print version ISSN 0034-7280On-line version ISSN 1982-8551


HIDA, Wilson Takashi et al. Wavefront analysis and contrast sensitivity comparison between spheric and aspheric intraocular lenses. Rev. bras.oftalmol. [online]. 2008, vol.67, n.3, pp.119-124. ISSN 0034-7280.

PURPOSE: Compare the wavefront and contrast sensitivity of bilateral pseudophakic patients with aspheric in one eye and spheric intraocular lenses in the other. METHODS: This prospective, comparative, randomized study, double masked, included 32 eyes of 16 patients. A complete ophthalmic evaluation was done before, and after surgery at days 1,3, 7 and 90, and included best corrected visual acuity, the contrast sensitivity, under photopic and mesopic conditions, and aberrometry. Almost all exams were done monocularly with undilated pupils (aberrometry under pharmacological dilatation). The patients eyes were operated with conventional phacoemulsification, with aspheric intraocular lenses in one eye, and spherical in the other. RESULTS: The visual acuity with the best correction was -0.146 in the spheric group, and -0.165 logMAR in the aspheric group in photopic conditions, and 0.024 and -0.003 LogMAR under mesopic conditions. The contrast sensitivity under photopic and mesopic conditions was similar comparing the two groups. In regard to optical aberrations there was a significant diference between the total (1.09 ± 0.56 in the aspheric, and 1.52± 1.19 in the spherical group) and spherical component of high order aberrations (0.422± 0.202 in spheric group and 0.124 ± 0.087 in the aspheric group). CONCLUSION: Both groups reached excellent postoperative visual acuity in high contrast situations, however aspheric intraocular lenses group had lower total and spherical aberrations, comparing to the spheric intraocular lenses group.

Keywords : Lenses, intraocular; Phacoemulsification; Contrast sensitivity; Vision.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License