Characterization of soft contact lens edge fitting using ultra-high resolution and ultra-long scan depth optical coherence tomography

Meixiao Shen, Lele Cui, Colleen Riley, Michael R. Wang, Jianhua H. Wang

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Purpose. To characterize the edge fitting of soft contact lenses using ultra-high resolution optical coherence tomography (UHR-OCT) and ultra-long scan depth optical coherence tomography (UL-OCT). Methods. A total of 20 participants (11 men, 9 women; mean age, 32.3 years) were recruited. Four different types of soft contact lenses were randomly fitted to both eyes of each subject on two separate visits. After 30 minutes, the horizontal meridians of the corneal center, midperiphery, and limbus were imaged by UHR-OCT. UL-OCT imaged each lens in vitro and the ocular surface of a physical model eye. Results. Angle-edged lenses had significantly less conjunctival buildup than did round-edged lenses (P = 0.008). Limbal post-lens tear film gaps were present in 42% of the eyes, with the round-edged lenses having the most at 68%. Similarly, post-lens tear film gaps at the corneal mid-periphery were present in 47% of all eyes, with the round-edged lens having the most at 75%. Mismatches between the lens and the ocular surface were simulated based on UL-OCT images of the in vitro lenses and the model eye. The existence of tear film gaps and touching points were predicted in the simulation. Conclusions. The soft contact lens edge fitting was characterized by the conjunctival buildup and tear film gaps. Different types of contact lenses presented different levels of conjunctival buildup as well as different frequencies of tear film gaps. The findings by UHR-OCT were predicted in the simulation by UL-OCT. The application of these new technologies may open new ways of designing lenses and evaluating their fit.

Original languageEnglish (US)
Pages (from-to)4091-4097
Number of pages7
JournalInvestigative Ophthalmology and Visual Science
Volume52
Issue number7
DOIs
StatePublished - Jun 2011

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Fingerprint Dive into the research topics of 'Characterization of soft contact lens edge fitting using ultra-high resolution and ultra-long scan depth optical coherence tomography'. Together they form a unique fingerprint.

Cite this