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The quality and usability of smartphone and hand‐held fundus photography, compared to standard fundus photography

distance was specified in 49%, range 12–18 inch (30–40 cm). The average calculated retina projection was 12.3° (ranging from 6.8° to 20.8°). Only two grids (1.7%) would project to 20° of the macula. Google and YouTube are freely available, and mobile Apps vary from free to £28.99. Most of the sources are produced by ophthalmologist practices (39%) followed by Optometrist related groups (16%). Amsler charts are commonly used in patients as a self-screen tool. The instructions and dimensions can both affect the accuracy of the test. Videosharing media and Internet may be an effective way to disseminate interventions for patients and should be utilized in conjunct with correction instructions provided by healthcare professionals. Our study highlights there is a need of quality-controlled information on Amsler chart.