| Institution: | 1. Institute of Biomedical Optics and Optometry, Key Lab of Medical Optical Technology and Instruments, Ministry of Education, University of Shanghai for Science and Technology, Shanghai, China;2. Institute of Biomedical Optics and Optometry, Key Lab of Medical Optical Technology and Instruments, Ministry of Education, University of Shanghai for Science and Technology, Shanghai, China
Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for Science and Technology, Shanghai, China;3. Department of Ophthalmology, Yangpu District Shidong Hospital, Shanghai, China |
| Abstract: | In order to meet the demands of myopia prevention, as well as the increasing needs of measurement for refractive and cataract operations in China, a new axial length (AL) measurement system combining an improved Twyman-Green interferometer with digital signal processing has been established. The ALs of 33 eyes of different optical refractive subjects (−8.50 ~ 0.50 D) were measured with the New AL and intraocular lens (IOL) master. The repeatability of measurements with the New AL was assessed using coefficient of variation (CoV) and intra-group correlation coefficient (ICC). Comparison, correlation, linear regression and agreement of AL between devices were analyzed. There was good repeatability (CoV = 0.0617%, ICC = 0.9999) with the New AL and great agreement has been obtained with both devices. These show that the New AL is capable of providing precise AL values over the normal AL range compared to the IOL master, and indicate that the New AL developed can be used for routine clinical AL measurements. |
