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Deep Learning Algorithm for the Diagnosis and Prediction of Hydroxychloroquine Retinopathy: An International,
Peter Woodward-Court1, Jeffry Hogg2, Terry Lee3
1NIHR Biomedical Research Centre, Moorfields Eye Hospital NHS Foundation Trust, UCL Institute of Ophthalmology, London, United Kingdom.
Ophthalmology. Retina
|June 13, 2025
Summary
A new deep learning algorithm, HCQuery, can detect hydroxychloroquine retinopathy using SD-OCT images. It also predicts future retinopathy occurrence, identifying it years before clinical diagnosis.
Area of Science:
- Ophthalmology
- Artificial Intelligence
- Medical Imaging
Background:
- Hydroxychloroquine (HCQ) is a medication used to treat autoimmune diseases.
- Long-term HCQ use can lead to retinopathy, a serious eye condition.
- Early detection of HCQ retinopathy is crucial for preventing vision loss.
Purpose of the Study:
- To develop a deep-learning algorithm (HCQuery) for detecting hydroxychloroquine retinopathy.
- To predict the future occurrence of hydroxychloroquine retinopathy from SD-OCT images.
Main Methods:
- A deep-learning algorithm (EfficientNet-b4) was trained and validated on retrospective SD-OCT images from 409 patients.
- The algorithm processed macular volumes from two SD-OCT devices.
- Performance was assessed using sensitivity, specificity, accuracy, PPV, NPV, AUROC, and AUPRC.
Main Results:
- The HCQuery algorithm demonstrated high accuracy (0.987) in detecting HCQ retinopathy at the time of clinical diagnosis.
- It successfully predicted retinopathy an average of 220.8 days before clinical diagnosis.
- For eyes that developed retinopathy, HCQuery identified it an average of 2.74 years in advance.
Conclusions:
- A deep-learning algorithm, HCQuery, can effectively detect hydroxychloroquine retinopathy.
- HCQuery can predict retinopathy years in advance of clinical diagnosis.
- This algorithm holds potential for early intervention and improved patient outcomes.

