The Glaucoma Field Defect Classifier was developed by Federico Lattuada, Rohan Sanghera, and Arun Thirunavukarasu to automate application of Hodapp-Parrish-Anderson criteria that is otherwise too laborious to use in day-to-day clinical practice. The web-application can also incorporate visual acuity data to identify eligibility for certification of visual impairment (CVI), based on United Kingdom Guidelines.
The computer vision algorithm used for perimetry plot interpretation exhibited perfect accuracy in an initial validation study published in npj Digital Medicine. GFDC was subsequently used as part of a semi-automated algorithm to identify CVI-eligible glaucoma patients in a large cross-sectional study of patients at Cambridge University Hospitals NHS Foundation Trust, published in British Journal of Ophthalmology.
Currently, the pattern deviation plot must be copied and pasted into the corresponding section. Do not include any patient-identifiable data. Ensure the plot title is not included, and that the axis are fully visible, and are not clipped by the screenshot. Mean deviation and central decibel values from the global plot are inputted as numbers. Visual acuity is also inputted as a number (expressed in terms of logMAR)—but is an optional input for if users are interested in CVI eligibility. The source code is freely available online here and can be adapted to work with larger batches of perimetry plots rather than manually inputting data.
Please use the form below to get in touch with the development team.
Please fill out the form below.
Thirunavukarasu, A. J. et al. Semi-automated screening reveals patients with glaucoma-induced blindness missing out on social support: a cross-sectional study of certificate of visual impairment allocation. Br J Ophthalmol 1–6 (2025) doi:10.1136/bjo-2024-326745.
Thirunavukarasu, A. J. et al. A validated web-application (GFDC) for automatic classification of glaucomatous visual field defects using Hodapp-Parrish-Anderson criteria. npj Digit. Med. 7, 1–4 (2024).
This website uses the SB Admin 2 Bootstrap template by Start Bootstrap, released under the MIT License.