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The results show that we can get fundus images clearly, and the imaging system will be able to correct refractive errors ranging from <jats:inline-formula>\n      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\">\n\t<mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t  <mml:mo>\u2212<\/mml:mo>\n\t<\/mml:mrow>\n\t<mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t  <mml:mn>8<\/mml:mn>\n\t  <mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t    <mml:mi mathvariant=\"normal\">D<\/mml:mi>\n\t  <\/mml:mrow>\n\t<\/mml:mrow>\n\t<mml:mo>\u223c<\/mml:mo>\n\t<mml:mo>+<\/mml:mo>\n\t<mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t  <mml:mn>8<\/mml:mn>\n\t  <mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t    <mml:mi mathvariant=\"normal\">D<\/mml:mi>\n\t  <\/mml:mrow>\n\t<\/mml:mrow>\n      <\/mml:math>\n    <\/jats:inline-formula>. The spatial resolution of the system is up to 15\u00a0\u00b5m. This is a portable device with an overall size of <jats:inline-formula>\n      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\">\n\t<mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t  <mml:mn>160<\/mml:mn>\n\t<\/mml:mrow>\n\t<mml:mspace width=\"thickmathspace\"\/>\n\t<mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t  <mml:mi mathvariant=\"normal\">m<\/mml:mi>\n\t  <mml:mi mathvariant=\"normal\">m<\/mml:mi>\n\t<\/mml:mrow>\n\t<mml:mo>\u00d7<\/mml:mo>\n\t<mml:mn>160<\/mml:mn>\n\t<mml:mspace width=\"thickmathspace\"\/>\n\t<mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t  <mml:mi mathvariant=\"normal\">m<\/mml:mi>\n\t  <mml:mi mathvariant=\"normal\">m<\/mml:mi>\n\t<\/mml:mrow>\n\t<mml:mo>\u00d7<\/mml:mo>\n\t<mml:mn>80<\/mml:mn>\n\t<mml:mspace width=\"thickmathspace\"\/>\n\t<mml:mrow class=\"MJX-TeXAtom-ORD\">\n\t  <mml:mi mathvariant=\"normal\">m<\/mml:mi>\n\t  <mml:mi mathvariant=\"normal\">m<\/mml:mi>\n\t<\/mml:mrow>\n      <\/mml:math>\n    <\/jats:inline-formula> and a weight of 540\u00a0g. It has the advantages of lower price, simple operation, high resolution, and compact size, making it suitable as a portable ocular monitoring device.<\/jats:p>","DOI":"10.1364\/ao.414325","type":"journal-article","created":{"date-parts":[[2021,1,13]],"date-time":"2021-01-13T16:29:04Z","timestamp":1610555344000},"page":"1420","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Optical design and fabrication of a smartphone fundus camera"],"prefix":"10.1364","volume":"60","author":[{"given":"Weilin","family":"Chen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun","family":"Chang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuehui","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sitong","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"285","published-online":{"date-parts":[[2021,2,9]]},"reference":[{"key":"ao-60-5-1420-R1","volume-title":"Optical Devices in Ophthalmology and Optometry: Technology, Design Principles, and Clinical Applications","author":"Rabin","year":"2015"},{"key":"ao-60-5-1420-R4","doi-asserted-by":"publisher","first-page":"1061","DOI":"10.1364\/AO.28.001061","volume":"28","author":"Delori","year":"1989","journal-title":"Appl. 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