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Visual performance with changes in eccentricity in PROSE device: a case report.

Divya Jagadeesh1, Rajeswari Mahadevan1

  • 1Contact Lens Department, Medical Research Foundation, India; Elite School of Optometry, Unit of Medical Research Foundation, Chennai, Tamil Nadu, India.

Journal of Optometry
|April 29, 2014
PubMed
Summary
This summary is machine-generated.

This case report shows how different front surface eccentricities (FSEs) of Prosthetic Replacement of Ocular Surface Ecosystem (PROSE) devices affect vision in keratoconus. A 0.6 FSE PROSE device offered the best visual results and reduced higher-order aberrations.

Keywords:
Dispositivo PROSEExcentricidad de la superficie frontalFront surface eccentricityKeratoconusPROSE deviceQueratocono

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Optometry

Background:

  • Keratoconus is a progressive eye condition causing irregular cornea shapes and vision impairment.
  • Prosthetic Replacement of Ocular Surface Ecosystem (PROSE) devices are custom-made contact lenses that can improve vision in irregular corneas.
  • Front surface eccentricities (FSEs) are a design parameter of PROSE devices that may influence visual outcomes.

Observation:

  • A single subject with moderate keratoconus was evaluated.
  • Visual performance and Higher Order Aberrations (HOAs) were measured using PROSE devices with varying FSEs (0, 0.3, 0.6, and 0.8).

Findings:

  • The PROSE device with a 0.6 FSE resulted in the greatest improvement in visual acuity for the subject.
  • This 0.6 FSE setting also led to a significant reduction in HOAs compared to other tested FSEs.
  • Lower and higher FSEs (0, 0.3, and 0.8) did not provide the same level of visual enhancement or HOA reduction.

Implications:

  • Optimizing FSEs in PROSE devices may enhance visual outcomes for keratoconus patients.
  • This finding suggests a potential individualized approach to PROSE device fitting for keratoconus.
  • Further research with larger cohorts is warranted to confirm the optimal FSE range for keratoconus management.