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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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Does Cataract Surgery Influence Iris-Based Biometric Authentication?

Sonali Vinay Kumar1, Vinay Kumar2, Natasha Vinay Kumar3

  • 1Command Hospital Eastern Command, Kolkata, West Bengal, India.

Romanian Journal of Ophthalmology
|July 23, 2025
PubMed
Summary
This summary is machine-generated.

Cataract surgery does not affect iris recognition accuracy. This study confirms iris biometrics remain reliable for identification after routine eye surgery, ensuring security and healthcare applications.

Keywords:
HD = Hamming distanceHamming distanceUIDAI = Unique Identification Authority of Indiabiometriccataract surgeryiris camerairis recognitionuneventful surgery

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Area of Science:

  • Ophthalmology
  • Biometrics
  • Computer Science

Background:

  • Iris recognition is a key biometric technology.
  • Cataract surgery is a common ophthalmic procedure.
  • Potential impact of cataract surgery on iris biometrics is unknown.

Purpose of the Study:

  • To investigate the effect of cataract surgery on iris recognition system accuracy.
  • To assess the reliability of iris biometrics post-surgery.

Main Methods:

  • Prospective observational study of 100 patients undergoing cataract surgery.
  • Preoperative and postoperative iris scans collected using a standard biometric device.
  • Analysis of matching scores and Hamming distance to evaluate pattern changes.

Main Results:

  • Uncomplicated cataract surgery did not significantly alter iris pattern matching accuracy.
  • 95% of postoperative images successfully matched preoperative images.
  • Mean Hamming distance remained within acceptable authentication thresholds, with 99% successful matches.

Conclusions:

  • Iris-based biometric systems demonstrate robustness following uncomplicated cataract surgery.
  • The findings support the continued use of iris recognition in healthcare and security settings for patients undergoing ocular procedures.