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Updated: Oct 26, 2025

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Anterior segment imaging using a simple universal smartphone attachment for patients.

Vineet Pramod Joshi1,2, Ashish Jain2, Rathinam Thyagrajan2

  • 1The Cornea Institute, L V Prasad Eye Institute, Hyderabad, India.

Seminars in Ophthalmology
|August 2, 2021
PubMed
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A new smartphone attachment, Grabi™Lite, and imaging protocol significantly improve anterior segment eye imaging quality. This advancement enhances diagnostic capabilities and supports the future of tele-ophthalmology.

Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Telemedicine

Background:

  • Smartphone-captured anterior segment eye images often suffer from poor quality due to factors like lack of perspective, focus, illumination, and resolution.
  • Existing methods for anterior segment imaging can be cumbersome and require specialized equipment, limiting accessibility for remote or self-administered assessments.

Purpose of the Study:

  • To develop and validate a universal smartphone attachment (Grabi™Lite) and imaging protocol to improve the quality of patient-captured anterior segment eye images.
  • To assess the utility of these improved images for clinical decision-making, risk stratification, and potential use in tele-ophthalmology consultations.

Main Methods:

  • Retrospective analysis of 344 patient-taken smartphone images to identify quality issues.
Keywords:
Anterior segment imagingOphthalmic imaging with a smartphoneSmartphone attachmentSmartphone imaging

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  • Design and prospective validation of the Grabi™Lite attachment and imaging protocol in 60 patients.
  • Comparison of Grabi™Lite images with gold-standard slit-lamp photography and assessment of diagnostic utility by masked observers in 9 patients trained with the protocol.

    • Main Results:

    • Initial smartphone images showed significant quality issues (e.g., 87.1% lacked focus).
    • Grabi™Lite + protocol improved image quality (57% good quality, p < 0.001) and suitability for clinical decision-making (45%) and risk stratification (88.8%, p < 0.001).
    • Images captured with Grabi™Lite achieved 57% of the quality of slit-lamp photographs and were suitable for clinical decision-making in 52.85% of cases.

    Conclusions:

    • The Grabi™Lite attachment combined with a standardized imaging protocol significantly enhances the quality of smartphone-based anterior segment eye imaging.
    • This approach improves the utility of patient-generated images for clinical decision-making and risk stratification, paving the way for effective tele-ophthalmology.
    • Grabi™Lite offers a universal, patient-operated solution for accessible anterior segment imaging, valuable for remote eye care and consultations.