Validation and reliability of Iris Recognistion cameras in MPS
Research type
Research Study
Full title
Validation and Reliability of Iris Recognition and Manual Digital Cameras using Bespoke Image Analysis Software for the Quantification of Corneal Opacification in Mucopolysaccharidoses
IRAS ID
315339
Contact name
Jane Ashworth
Contact email
Sponsor organisation
University of Manchester
Duration of Study in the UK
0 years, 1 months, 31 days
Research summary
The mucopolysaccharidoses (MPS) are a group of disorders resulting from accumulation of glycosaminoglycans within various tissues including the eye. This can result in visual loss from corneal opacification. The assessment of corneal opacification is extremely subjective and based on a clinician grading this during slit lamp examination. There can be a significant variability and can prove problematic particularly in clinical trials assessing if corneal opacification is affected by potential new treatments.
The use of imaging could facilitate objective measurement of corneal clouding. A previous study using an iris camera and image analysis to provide a corneal opacification measure score (COM score) demonstrated that it can be used in children with MPS, however it still had limitations- as the system is fully automated, if certain conditions are not met an image is not captured. This can be an issue in younger children who may not be cooperative, and limited its use in younger patient populations.
It is anticipated that these limitations can be addressed by employing a newer iris camera (IriShield MK2120UL). The new camera’s advantage is that it takes images monocularly, therefore only the eye under question needs to be aligned. We will also assess a new manual system (DigiCam) which takes images whenever the shutter is manually pressed. This would be useful in children who cannot fixate with one eye, and can also be used when the child is examined under general anaesthetic which is commonly done in paediatric ophthalmology.
If proven to be comparable to the existing iris camera (IriscamOrig) in terms of validity and reliability, the added benefits of these new iris cameras can open its use in a wider range of patient populations – for instance, in paediatric clinical trials–, as well as allowing longitudinal tracking of corneal clouding from early childhood well into adulthood.
REC name
South Central - Hampshire B Research Ethics Committee
REC reference
22/SC/0214
Date of REC Opinion
15 Jul 2022
REC opinion
Further Information Favourable Opinion