Tele-ophthalmic screening using digital imaging devices

K. Yogesan, Ian Constable, R.J. Eikelboom, P.P. Van Saarloos

Research output: Contribution to journalArticle

38 Citations (Scopus)


Background: Digital imaging systems provide immediate, magnified images that can easily be analysed, enhanced, archived, printed on near photographic-quality paper and transferred electronically to remote computers. We have assembled a digital ophthalmic system and tested it on patients with some common causes of blindness: corneal scarring and cataract, diabetic retinopathy, macular degeneration and glaucoma.Methods: Digital images were obtained using a variety of ophthalmic imaging devices ranging from slit-lamp, fundus camera, indirect ophthalmoscope and scanning laser ophthalmoscope.These images were compressed in order to concentrate image information (image size reduced by 90-95%) and minimize transmission time (reduced by 97-98%). Standard or mobile telephone lines were used to transmit images to remote terminals.Results/Discussion: Transmission time was reduced from 15-20 min to 20-30 s and the image size was reduced from 1.3 MB to 20-30 kB by compressing the images before transmission. Image quality is still excellent.
Original languageEnglish
Pages (from-to)S9-S11
JournalAustralian and New Zealand Journal of Ophthalmology
Volume26 (Suppl.)
Publication statusPublished - 1998

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