Automatic refractometer

Background: This study was performed to evaluate the use of anterior segment images, obtained with an automatic refractometer, to identify early defects of the iris pigment epithelium in patients with pigment dispersion syndrome (PDS) or pigmentary glaucoma (PG) without observable alterations at the slit lamp. Methods: In this cross-sectional observational study, carried out from January 2018 to December 2019, in Policlinico Citta di Udine Health Center, Udine, Italy, we observed anterior segment infrared images of 1700 subjects who were undergoing routine ophthalmological examination using an automatic refractometer. We selected infrared images of subjects who fulfilled the inclusion and exclusion criteria and looked for a focal defect in the iris pigment epithelium. Results: Twenty patients with focal iris pigment epithelial defect were identified and none of them showed evident signs of PDS. After the necessary explanations, they agreed to have further examinations to verify the possibility of PDS. An in-depth evaluation of ocular structures, including gonioscopy, demonstrated the presence of PDS in all subjects with iris defects. Conclusions: The use of infrared images obtained by an automatic refractometer could provide early and easy identification of PDS in crowded ophthalmology clinics or mass screening programs; yet, more well-designed studies are necessary to confirm these preliminary findings and prove this proposed screening tool.

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Comparison of Refractive Error Measurements between KR-1W Wavefront Analyser and KR-8800 Automatic Refractometer in School children

JOURNAL FOR CLINICAL AND DIAGNOSTIC RESEARCH ◽

10.7860/jcdr/2018/34555.11663 ◽

2018 ◽

Author(s):

Jing Dong ◽

Qiang Wu ◽

Xiaogang Wang

Keyword(s):

School Children ◽

Refractive Error ◽

Automatic Refractometer

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Relationship between Myopia Progression and School Entrance Age: A 2.5-Year Longitudinal Study

Journal of Ophthalmology ◽

10.1155/2021/7430576 ◽

2021 ◽

Vol 2021 ◽

pp. 1-7

Author(s):

Linjie Liu ◽

Dandan Jiang ◽

Chunchun Li ◽

Yaoyao Lin ◽

Wenzhe Zhou ◽

...

Keyword(s):

Anterior Chamber Depth ◽

Radius Of Curvature ◽

Spherical Equivalent ◽

Biological Structure ◽

Myopia Progression ◽

School Entrance ◽

Corneal Radius ◽

Grade 3 ◽

Automatic Refractometer ◽

Entrance Age

Objective. To investigate the association between myopia progression and school entrance age among Chinese schoolchildren and to suggest a more appropriate school age. Methods. 1,463 children aged six to nine years from Wenzhou, China, were examined and followed up for two and a half consecutive years. Their noncycloplegic refraction was measured twice each year by using an automatic refractometer; axial length (AL) and corneal radius of curvature (CRC) were tested annually by using the IOLMaster for 2.5 years. The questionnaires were completed by the children to collect detailed information regarding risk factors. Here, myopia is defined as a spherical equivalent less than −1.0D. Results. The changes in spherical equivalent (SE) of 7-year-old children in grade 1 and grade 2 were −0.45D and -0.56D, while changes in AL were 0.59 mm and 0.62 mm, respectively. The SE changes of 8-year-old children in grade 2 and grade 3 were −0.54D and −0.75D; meanwhile, the AL changes were 0.57 mm and 0.61 mm, respectively. Significant statistical differences were observed in ocular biological structure parameters, except for corneal radius of curvature (CRC) or anterior chamber depth (ACD), among children with the same age in different grades during this study. The prevalence of myopia was also significantly higher in higher grades for children with same age. Conclusions. Myopia is related to children’s school entrance age. Children who start school in an earlier age are more likely to suffer from myopia, and the progression of myopia can be considerably faster. Therefore, it is recommended to enter school after the age of 7.

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