Teresa Ferrer-Blasco1, Alberto Domínguez-Vicent1, Santiago García-Lázaro1, María Amparo Díez-Ajenjo1,2, José F Alfonso3,4, José J Esteve-Taboada1. 1. Department of Optics and Optometry and Visual Science, University of Valencia, Valencia 46100, Spain. 2. Clínica Optométrica, Fundació Lluís Alcanyís Universitat de València, Valencia 46020, Spain. 3. Surgery Department, Fernández-Vega Ophthalmological Institute, Oviedo 33012, Spain. 4. School of Medicine, University of Oviedo, Oviedo 33006, Spain.
Abstract
AIM: To evaluate the repeatability of an optical device for measuring the Zernike coefficients of toric intraocular lenses (IOLs) and assess whether its toricity has any impact in its repeatability. METHODS: An experienced technician used the NIMO TR1504 to measure the Zernike coefficients 30 times for an aperture of 4.50 mm for all lenses included. The IOLs included were divided into two group: toric and non-toric ones. The cylindrical powers of the toric lenses included in the present study were 1.00, 1.50, 2.25, 3.00 and 3.75 D. Finally, the repeatability of the NIMO TR1504 was described in terms of within subject standard deviation (Sw) and repeatability limit. RESULTS: The Sw was smaller than 0.011 µm for both lens groups and all Zernike coefficients, and the difference between both groups was smaller than 0.004 µm for all Zernike coefficients. Regarding the repeatability limit, this value was smaller than 0.025 µm for the toric lens group, and smaller than 0.031 µm for the non-toric lens one for all Zernike coefficients. Furthermore, the maximum difference between both lens groups was 0.010 µm. CONCLUSION: The repeatability of the NIMO TR1504 to measure the optical quality is high and independent of the lens toricity. These results reflect that this system is robust and could be used to measure the in-vitro optical quality of either toric or non-toric IOLs.
AIM: To evaluate the repeatability of an optical device for measuring the Zernike coefficients of toric intraocular lenses (IOLs) and assess whether its toricity has any impact in its repeatability. METHODS: An experienced technician used the NIMO TR1504 to measure the Zernike coefficients 30 times for an aperture of 4.50 mm for all lenses included. The IOLs included were divided into two group: toric and non-toric ones. The cylindrical powers of the toric lenses included in the present study were 1.00, 1.50, 2.25, 3.00 and 3.75 D. Finally, the repeatability of the NIMO TR1504 was described in terms of within subject standard deviation (Sw) and repeatability limit. RESULTS: The Sw was smaller than 0.011 µm for both lens groups and all Zernike coefficients, and the difference between both groups was smaller than 0.004 µm for all Zernike coefficients. Regarding the repeatability limit, this value was smaller than 0.025 µm for the toric lens group, and smaller than 0.031 µm for the non-toric lens one for all Zernike coefficients. Furthermore, the maximum difference between both lens groups was 0.010 µm. CONCLUSION: The repeatability of the NIMO TR1504 to measure the optical quality is high and independent of the lens toricity. These results reflect that this system is robust and could be used to measure the in-vitro optical quality of either toric or non-toric IOLs.
Authors: Jose Juan Esteve-Taboada; Alberto Domínguez-Vicent; Antonio J Del Águila-Carrasco; Teresa Ferrer-Blasco; Robert Montés-Micó Journal: J Refract Surg Date: 2015-10 Impact factor: 3.573
Authors: David Madrid-Costa; Javier Ruiz-Alcocer; Teresa Ferrer-Blasco; Santiago García-Lázaro; Robert Montés-Micó Journal: J Refract Surg Date: 2013-11 Impact factor: 3.573
Authors: Eleni Papadatou; Antonio J Del Águila-Carrasco; José J Esteve-Taboada; David Madrid-Costa; Robert Montés-Micó Journal: J Cataract Refract Surg Date: 2016-05 Impact factor: 3.351
Authors: Alberto Domínguez-Vicent; Jose Juan Esteve-Taboada; Antonio J Del Águila-Carrasco; Daniel Monsálvez-Romin; Robert Montés-Micó Journal: J Cataract Refract Surg Date: 2016-01 Impact factor: 3.351