Reading performance after implantation of a small-aperture corneal inlay for the surgical correction of presbyopia: Two-year follow-up

Abstract

After implantation of the small-aperture intracorneal inlay, there was an improvement in all tested reading performance parameters in emmetropic presbyopic patients; the improvement was the result of an increased depth of field. These 2-year results indicate that the inlay is an effective treatment for presbyopia.

Reading performance and patient satisfaction after corneal inlay implantation for presbyopia correction: Two-year follow-up

“…The development of materials with enhanced biocompatibility, 7,8 advances in technology such as femtosecond lasers, and a better understanding of physiology and the wound-healing response have allowed corneal inlay technology to mature. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Currently available presbyopia-correcting corneal inlays are based on creating a hyperprolate cornea by inserting a space-occupying inlay (VueC, Revision Optics, Inc.), 13 generating a bifocal optic by implanting refractive annular addition lenticules (Flexivue Q 2012 ASCRS and ESCRS 0886-3350/$ -see front matterPublished by Elsevier Inc. http://dx. …”

“…[10][11][12][13][14][15][16][17] Since approval by the authorities of the Conformit ee Europ eenne (CE-mark) in 2005, refractive surgeons have been able to implant the Kamra corneal inlay outside clinical trials on a commercial basis, whereas the technique is still under investigation in U.S. Food and Drug Administration (FDA) clinical trials for the treatment of near-plano and plano presbyopia. [10][11][12][13][14][15][16][17] Designed to increase the depth of focus based on the principle of small-aperture optics, the corneal inlay was designed to improve uncorrected near and intermediate vision while minimally affecting distance vision. 10 Mid-term and long-term studies support the efficacy and safety of this inlay for the treatment of presbyopia, with published data for up to 4 years.…”

“…10 Mid-term and long-term studies support the efficacy and safety of this inlay for the treatment of presbyopia, with published data for up to 4 years. [10][11][12][14][15][16][17] The main intention of the Kamra corneal inlay is to improve uncorrected near vision; thus, the assessment of reading performance is considered to be the most important clinical examination for evaluating the benefits of this presbyopia treatment. 12,14 The Salzburg Reading Desk measures reading performance using computerized testing under standardized conditions while simulating a natural reading process.…”

“…[10][11][12][14][15][16][17] The main intention of the Kamra corneal inlay is to improve uncorrected near vision; thus, the assessment of reading performance is considered to be the most important clinical examination for evaluating the benefits of this presbyopia treatment. 12,14 The Salzburg Reading Desk measures reading performance using computerized testing under standardized conditions while simulating a natural reading process. 12,14,[19][20][21][22] In a recent study, 14 we assessed uncorrected bilateral reading acuity, reading distance, mean and maximum reading speed, and the smallest log-scaled print size patients could effectively read over a 1-year followup after implantation of the commercially available Kamra corneal inlay.…”

KAMRA corneal inlay for the correction of presbyopia

“…Corneal inlays are also an upcoming solution for presbyopia correction, especially the KAMRA inlay, which is a small aperture corneal inlay that is placed into the corneal stroma and blocks the non-focused rays of light, allowing only the focused rays to reach the retina, resulting in an increase of the depth of field [8].…”