Tele‐ophthalmic screening using digital imaging devices

Kanagasingam, Yogesan; Constable, Ian J.; Eikelboom, Robert H.; Saarloos, P.P. Van

doi:10.1111/j.1442-9071.1998.tb01385.x

Cited by 41 publications

(24 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5,6 In our study, in the Chatham-Kent context, a teleophthalmology program would be more effective than in-person examination, detecting 15% more cases of any diabetic retinopathy at $314.10 per additional case. However, it would also be more expensive.…”

Section: Discussionmentioning

confidence: 60%

“…4 In addition to nonmodifiable factors, limited availability of eye care specialists, travelling difficulties and time constraints also contribute to nonadherence, especially in nonurban areas. 5,6 Pharmacy-based teleophthalmology has emerged as a possible alternative to in-person examinations that may facilitate compliance with evidence-based recommendations and reduce barriers to specialized eye care. 7,8 In a pharmacy-based teleophthalmology program, retinal digital images are captured in a local pharmacy and are securely transmitted electronically to a specialized reading centre, where photographs are graded by an eye specialist.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Diabetic retinopathy screening with pharmacy-based teleophthalmology in a semiurban setting: a cost-effectiveness analysis

et al. 2016

View full text Add to dashboard Cite

CMAJ OPEN, 4(1) E95D iabetic retinopathy is a sight-threatening complication in patients with diabetes mellitus that is usually asymptomatic in the early stages. 1 Effective treatment exists, with over 50% of patients experiencing reduction of severe vision loss if they receive treatment after timely diagnosis. 2About 50% of patients with diabetes do not receive eye examinations as recommended by the American Academy of Ophthalmology.3 This results in lost opportunities to prevent severe vision loss by means of timely treatment delivery. 4 In addition to nonmodifiable factors, limited availability of eye care specialists, travelling difficulties and time constraints also contribute to nonadherence, especially in nonurban areas. 5,6 Pharmacy-based teleophthalmology has emerged as a possible alternative to in-person examinations that may facilitate compliance with evidence-based recommendations and reduce barriers to specialized eye care. 7,8 In a pharmacy-based teleophthalmology program, retinal digital images are captured in a local pharmacy and are securely transmitted electronically to a specialized reading centre, where photographs are graded by an eye specialist.9 Patients with signs of diabetic retinopathy can then be referred to an eye care professional Background: Diabetic eye complications are the leading cause of visual loss among working-aged people. Pharmacy-based teleophthalmology has emerged as a possible alternative to in-person examination that may facilitate compliance with evidence-based recommendations and reduce barriers to specialized eye care. The objective of this study was to estimate the cost-effectiveness of mobile teleophthalmology screening compared with in-person examination (primary care) for the diabetic population residing in semiurban areas of southwestern Ontario.

show abstract

Section: Discussionmentioning

confidence: 60%

mentioning

confidence: 99%

Diabetic retinopathy screening with pharmacy-based teleophthalmology in a semiurban setting: a cost-effectiveness analysis

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Digital imaging systems provide immediate, magnified images that can easily be analysed, enhanced, archived, printed or transferred electronically to remote computers 4 . Although most eye clinics record fundus pictures on photographic film 5,6 , many university eye clinics and other tertiary referral centres have recently begun to use colour charge-coupled device (CCD) cameras interfaced to fundus cameras.…”

mentioning

confidence: 99%

Hand-held digital video-camera for eye examination and follow-up

Saari¹,

Kerola

Broas

et al. 2002

J Telemed Telecare

View full text Add to dashboard Cite

We developed a hand-held digital colour video-camera for eye examination in primary care. The device weighed 550 g. It featured a charge-coupled device (CCD) and corrective optics. Both colour video and digital still images could be taken. The video-camera was connected to a PC with software for database storage, image processing and telecommunication. We studied 88 normal subjects (38 male, 50 female), aged 7-62 years. It was not necessary to use mydriatic eye drops for pupillary dilation. Satisfactory digital images of the whole face and the anterior eye were obtained. The optic disc and the central part of the ocular fundus could also be recorded. Image quality of the face and the anterior eye were excellent; image quality of the optic disc and macula were good enough for tele-ophthalmology. Further studies are needed to evaluate the usefulness of the equipment in different clinical conditions.

show abstract

“…[7][8][9][10][11] Several studies comparing the image quality and effectiveness of these methods have been published. [12][13][14][15][16][17] Recently there have been several articles published on automatic detection and quantification of diabetic retinopathy lesions from fluorescein angiograms.…”

mentioning

confidence: 99%

Comparison of Diagnosis of Early Retinal Lesions of Diabetic Retinopathy Between a Computer System and Human Experts

Lee

Kingsley

et al. 2001

Arch Ophthalmol

View full text Add to dashboard Cite

Objective: To investigate whether a computer vision system is comparable with humans in detecting early retinal lesions of diabetic retinopathy using color fundus photographs.Methods: A computer system has been developed using image processing and pattern recognition techniques to detect early lesions of diabetic retinopathy (hemorrhages and microaneurysms, hard exudates, and cotton-wool spots). Color fundus photographs obtained from American Indians in Oklahoma were used in developing and testing the system. A set of 369 color fundus slides were used to train the computer system using 3 diagnostic categories: lesions present, questionable, or absent (Y/Q/N). A different set of 428 slides were used to test and evaluate the system, and its diagnostic results were compared with those of 2 human experts-the grader at the University of Wisconsin Fundus Photograph Reading Center (Madison) and a general ophthalmologist. The experiments included comparisons using 3 (Y/Q/N) and 2 diagnostic categories (Y/N) (questionable cases excluded in the latter).Results: In the training phase, the agreement rates, sensitivity, and specificity in detecting the 3 lesions between the retinal specialist and the computer system were all above 90%. The statistics were high (0.75-0.97), indicating excellent agreement between the specialist and the computer system. In the testing phase, the results obtained between the computer system and human experts were consistent with those of the training phase, and they were comparable with those between the human experts. Conclusions:The performance of the computer vision system in diagnosing early retinal lesions was comparable with that of human experts. Therefore, this mobile, electronically easily accessible, and noninvasive computer system, could become a mass screening tool and a clinical aid in diagnosing early lesions of diabetic retinopathy.

show abstract

Tele‐ophthalmic screening using digital imaging devices

Abstract: Transmission time was reduced from 15-20min to 20-30s 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.

Cited by 41 publications

References 1 publication

Diabetic retinopathy screening with pharmacy-based teleophthalmology in a semiurban setting: a cost-effectiveness analysis

Diabetic retinopathy screening with pharmacy-based teleophthalmology in a semiurban setting: a cost-effectiveness analysis

Hand-held digital video-camera for eye examination and follow-up

Comparison of Diagnosis of Early Retinal Lesions of Diabetic Retinopathy Between a Computer System and Human Experts

Contact Info

Product

Resources

About