The Experts below are selected from a list of 5169 Experts worldwide ranked by ideXlab platform
Paolo Pesando - One of the best experts on this subject based on the ideXlab platform.
-
Collamer intraocular contact Lens to correct high myopia
Journal of Cataract & Refractive Surgery, 1996Co-Authors: Vincenzo Assetto, Stefano Benedetti, Paolo PesandoAbstract:Abstract Purpose: To determine the feasibility of using posterior chamber intraocular contact Lenses to treat myopia. Setting: Ambulatory surgery centers in Torino, Ancona, and Ivrea, Italy. Methods: The phakic intraocular contact Lens is made of a collagen copolymer. We implanted 15 of these Lenses in 14 patients with preoperative spherical equivalents ranging from -10.8 to -24.0 diopters (D); average myopia was -15.3 D ± 3.1 (SID). Average follow-up was 7.0 ± 1.95 months. Results: Mean postoperative spherical equivalent was -2.0 ± 1.6 D. Uncorrected visual acuity improved in 14 eyes. Best spectacle-corrected acuity was maintained or improved in all but one eye. No iritis or cataracts were observed. Six months postoperatively, the mean endothelial cell loss was 4%. A pupillary block requiring a superior peripheral iridectomy occurred in one eye. Conclusions: Because of the incomplete follow-up, we cannot draw conclusions about the long-term safety of the implantable contact Lens. The intimate contact between the contact Lens and the natural Lens raises the possibility of cataract formation. However, examination by Scheimpflug photography and ultrasound biomicroscopy showed no Progressive Lens opacities. J Cataract Refract Surg 1996; 22:551-556
Bibianna Sinying Yu - One of the best experts on this subject based on the ideXlab platform.
-
the hong kong Progressive Lens myopia control study study design and main findings
Investigative Ophthalmology & Visual Science, 2002Co-Authors: Marion H Edwards, Roger W Li, Bibianna Sinying YuAbstract:PURPOSE. To determine whether the use of Progressive addition spectacle Lenses reduced the progression of myopia, over a 2-year period, in Hong Kong children between the ages of 7 and 10.5 years. METHODS. A clinical trial was carried out to compare the progression in myopia in a treatment group of 138 (121 retained) subjects wearing Progressive Lenses (PAL; add 1.50 D) and in a control group of 160 (133 retained) subjects wearing single vision Lenses (SV). The research design was masked with random allocation to groups. Primary measurements outcomes were spherical equivalent refractive error and axial length (both measured using a cycloplegic agent). RESULTS. There were no statistically significant differences between the PAL and the SV groups for of any of the baseline outcome measures. After 2 years there had been statistically significant increases in myopia and axial length in both groups; however, there was no difference in the increases that occurred between the two groups. CONCLUSIONS. The research design used resulted in matched treatment and control groups. There was no evidence that progression of myopia was retarded by wearing Progressive addition Lenses, either in terms of refractive error or axial length. (Invest Ophthalmol Vis Sci. 2002;43:2852‐2858)
Vincenzo Assetto - One of the best experts on this subject based on the ideXlab platform.
-
Collamer intraocular contact Lens to correct high myopia
Journal of Cataract & Refractive Surgery, 1996Co-Authors: Vincenzo Assetto, Stefano Benedetti, Paolo PesandoAbstract:Abstract Purpose: To determine the feasibility of using posterior chamber intraocular contact Lenses to treat myopia. Setting: Ambulatory surgery centers in Torino, Ancona, and Ivrea, Italy. Methods: The phakic intraocular contact Lens is made of a collagen copolymer. We implanted 15 of these Lenses in 14 patients with preoperative spherical equivalents ranging from -10.8 to -24.0 diopters (D); average myopia was -15.3 D ± 3.1 (SID). Average follow-up was 7.0 ± 1.95 months. Results: Mean postoperative spherical equivalent was -2.0 ± 1.6 D. Uncorrected visual acuity improved in 14 eyes. Best spectacle-corrected acuity was maintained or improved in all but one eye. No iritis or cataracts were observed. Six months postoperatively, the mean endothelial cell loss was 4%. A pupillary block requiring a superior peripheral iridectomy occurred in one eye. Conclusions: Because of the incomplete follow-up, we cannot draw conclusions about the long-term safety of the implantable contact Lens. The intimate contact between the contact Lens and the natural Lens raises the possibility of cataract formation. However, examination by Scheimpflug photography and ultrasound biomicroscopy showed no Progressive Lens opacities. J Cataract Refract Surg 1996; 22:551-556
Marion H Edwards - One of the best experts on this subject based on the ideXlab platform.
-
the hong kong Progressive Lens myopia control study study design and main findings
Investigative Ophthalmology & Visual Science, 2002Co-Authors: Marion H Edwards, Roger W Li, Bibianna Sinying YuAbstract:PURPOSE. To determine whether the use of Progressive addition spectacle Lenses reduced the progression of myopia, over a 2-year period, in Hong Kong children between the ages of 7 and 10.5 years. METHODS. A clinical trial was carried out to compare the progression in myopia in a treatment group of 138 (121 retained) subjects wearing Progressive Lenses (PAL; add 1.50 D) and in a control group of 160 (133 retained) subjects wearing single vision Lenses (SV). The research design was masked with random allocation to groups. Primary measurements outcomes were spherical equivalent refractive error and axial length (both measured using a cycloplegic agent). RESULTS. There were no statistically significant differences between the PAL and the SV groups for of any of the baseline outcome measures. After 2 years there had been statistically significant increases in myopia and axial length in both groups; however, there was no difference in the increases that occurred between the two groups. CONCLUSIONS. The research design used resulted in matched treatment and control groups. There was no evidence that progression of myopia was retarded by wearing Progressive addition Lenses, either in terms of refractive error or axial length. (Invest Ophthalmol Vis Sci. 2002;43:2852‐2858)
Leila Laatikainen - One of the best experts on this subject based on the ideXlab platform.
-
Traumatic cataract and other adverse events with the implantable contact Lens
Journal of cataract and refractive surgery, 2005Co-Authors: Anna-ulrika Sarikkola, H. Nida Sen, Risto Uusitalo, Leila LaatikainenAbstract:Purpose To evaluate the surgical outcome and adverse events associated with implantation of the implantable contact Lens (ICL) for the correction of high myopia or high hyperopia. Setting Helsinki University Eye Hospital, Helsinki, Finland. Methods In this nonrandomized prospective clinical trial, the ICL V4 was implanted in 26 eyes of 13 patients with normal enrollment criteria (younger than 45 years, a clinically clear crystalline Lens) (Group 1) and the V2, V3, or V4 were implanted in 38 eyes of 22 patients with heterogeneous criteria (older than 45 years or opacities in the crystalline Lens) (Group 2). The main outcome measures were Lens opacity classification system (LOCS II) assessment and transparency analysis of the Lens. Results In Group 1, microdensitometric assessment showed no decrease in crystalline Lens transparency and no statistically significant increase in crystalline Lens density at any follow-up examination (P>.05). The incidence of anterior subcapsular (AS) opacities was 7.7%, and no eye developed clinically significant cataract during the mean follow-up of 13.2 months ± 12.3 (SD). No myopic eye lost a line of best corrected visual acuity (BCVA); 50.0% of hyperopic eyes lost 1 line of BCVA. Sixty-eight percent of myopic eyes and 75.0% of hyperopic eyes were within ±1.0 diopter of the predicted refraction. In Group 2, the incidence of AS opacities was 47.4% and 10 eyes (26.3%) developed clinically significant cataract during the mean follow-up of 30.9 ± 18.0 months. The visual and refractive results were similar to those in Group 1 at 1 month, but due to Progressive AS opacities in the crystalline Lens, 23.4% of eyes lost BCVA lines during the follow-up. Intraoperative complications were few and insignificant. Conclusions Implantation of the ICL for correction of high myopia or high hyperopia appears to be a safe procedure with good visual and refractive results immediately. There was no decrease in the transparency or increase in the density of the crystalline Lens with the latest generation of the ICL device in the normal group, indicating enhanced safety. Progressive Lens opacification in the heterogeneous group shows there are risk factors for cataract formation; ie, type V3 ICL, preexisting Lens opacities, and older patient age. Anterior subcapsular opacities are most likely the result of trauma.
