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Epithelium Zernike Indices and Artificial Intelligence Can Differentiate Epithelial Remodeling Between Flap and Flapless Refractive Procedures
- Source :
- Journal of Refractive Surgery, 36(2), 97-103. Slack, Inc.
- Publication Year :
- 2020
- Publisher :
- Slack, Inc., 2020.
-
Abstract
- PURPOSE: To evaluate epithelial Zernike indices as a differentiator of epithelial remodeling after different refractive procedures. METHODS: Optical coherence tomography (OCT) images of 22 laser in situ keratomileusis, 22 small incision lenticule extraction, 15 photorefractive keratectomy (PRK), and 17 transepithelial PRK eyes were evaluated retrospectively before and after surgery. A custom algorithm was used to calculate the epithelial Zernike indices from the three-dimensional distribution of epithelial thickness distribution. The epithelial Zernike indices were also compared with the local measurements of epithelial thickness, used conventionally from the current clinical OCT. A decision tree classifier was built, one in which flap/cap and surface procedures were classified (2G) and another in which all surgical groups were classified separately (4G). RESULTS: Local measurements of thicknesses changed significantly after all surgeries ( P < .05), but these changes were similar in magnitude between the surgical platforms ( P > .05). The surgeries not only changed the epithelial Zernike indices ( P < .05), but also resulted in differential changes in epithelial thickness distribution based on the type of surgery ( P < .05). In the 2G analyses with local measurements of epithelial thickness, the area under the curve, sensitivity, and specificity were 0.57 ± 0.07, 42.11%, and 57.89%, respectively. Further, the accuracy was limited to less than 60%. In the 2G analyses with epithelial Zernike indices, the area under the curve, sensitivity, and specificity were 0.79 ± 0.05, 86.4%, and 71.9%, respectively. Here, the accuracy was limited between 70% and 80%. Similar trends were observed with 4G analyses. CONCLUSIONS: The epithelial Zernike indices were significantly better in identifying surgery-specific three-dimensional remodeling of the thickness compared to local measurements of epithelial thickness. Further, the changes in Zernike indices were independent of the magnitude of refractive error but not the type of surgery. [ J Refract Surg . 2020;36(2):97–103.]
- Subjects :
- Male
Refractive error
medicine.medical_treatment
Keratomileusis, Laser In Situ
Visual Acuity
Keratomileusis
Surgical Flaps
0302 clinical medicine
PHOTOREFRACTIVE KERATECTOMY
Myopia
PACHYMETRIC PARAMETERS
CORNEAL-THICKNESS
medicine.diagnostic_test
Epithelium, Corneal
FEMTOSECOND
Corneal topography
Refraction
Photorefractive keratectomy
Area Under Curve
symbols
Female
Lasers, Excimer
Tomography, Optical Coherence
Adult
MYOPIC LASIK
medicine.medical_specialty
Materials science
Zernike polynomials
Corneal Stroma
TOPOGRAPHY
Refraction, Ocular
PROFILE
Sensitivity and Specificity
Decision Support Techniques
03 medical and health sciences
symbols.namesake
Young Adult
Optical coherence tomography
Artificial Intelligence
Ophthalmology
TOMOGRAPHY
medicine
Small incision lenticule extraction
Humans
STROMAL THICKNESS
IN-SITU KERATOMILEUSIS
Retrospective Studies
Models, Statistical
Corneal Topography
Reproducibility of Results
medicine.disease
030221 ophthalmology & optometry
Surgery
030217 neurology & neurosurgery
Subjects
Details
- Language :
- English
- ISSN :
- 1081597X
- Volume :
- 36
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of Refractive Surgery
- Accession number :
- edsair.doi.dedup.....ac5db1ef68cc782e4a0ee00c382f4438