In­stead of send­ing pic­tures, visit doc­tors

The Free Press Journal - - ETCETERA -

Us­ing smart­phones to cap­ture pho­to­graphs of pa­tients’ eyes for check-up may lead to mis­di­ag­no­sis as cam­era colour sen­sors vary and as a re­sult, im­ages of the same eye may ap­pear dif­fer­ent de­pend­ing on the model of smart­phone used, warn re­searchers.

The study sug­gests that cal­i­bra­tion of phone cam­eras is vi­tal to cap­ture ac­cu­rate data. Eye ex­am­i­na­tions to look for red­ness in the eye can in­di­cate a va­ri­ety of con­di­tions in­clud­ing con­junc­tivi­tis, dry-eye dis­ease and tear-gland dys­func­tion.

Clin­i­cians in­creas­ingly use smart­phones in con­junc­tion with oph­thalmic imag­ing equip­ment, such as the eye­piece of a slit lamp, be­cause of their porta­bil­ity, ease of use and rel­a­tively low cost.

The con­nec­tiv­ity also al­lows for up­load to the Cloud, which is use­ful for telemedicine — the re­mote di­ag­no­sis and treat­ment of pa­tients us­ing telecom­mu­ni­ca­tions tech­nol­ogy — and Ar­ti­fi­cial In­tel­li­gence ap­pli­ca­tions that store thou­sands of im­ages from dif­fer­ent in­sti­tu­tions.

How­ever, the aut­o­fo­cus al­go­rithms and hard­ware spec­i­fi­ca­tions of cam­eras may be dif­fer­ent for dif­fer­ent man­u­fac­tur­ers which means dif­fer­ent cam­eras can pro­duce dif­fer­ent re­sults for the same scene. “It is im­por­tant that clin­i­cians bear this in mind,” said lead study au­thor Car­les Otero from Anglia Ruskin Uni­ver­sity in Eng­land. For the study, the re­searchers took 192 im­ages of eyes us­ing three smart­phone cam­eras, two dif­fer­ent light­ing lev­els and two zoom lev­els.

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