Publications by authors named "John Gelles"
Purpose: To report interim results of a single center, randomized, double-blind, crossover-controlled clinical trial comparing wavefront-guided (wfg) scleral lenses (SLs) to traditional scleral lenses (tSLs) for patients with a history of irregular corneal astigmatism (ICA).
Methods: Thirty-one ICA eyes of 18 participants were reviewed, 23 with keratoconus, six postcorneal refractive ectasia, and two postpenetrating keratoplasty. Patients with corneal or lens opacities were not excluded from participating.
Purpose: Keratoconus is a progressive disease characterized by changes in corneal shape, resulting in loss of visual function. There remains a lack of comprehensive understanding regarding its underlying pathophysiology. This review aims to bridge this gap by exploring structural failures and inflammatory processes involved in the etiology and progression of keratoconus.
View Article and Find Full Text PDFPurpose: Determine the pediatric prevalence of keratoconus (KC) using Scheimpflug corneal tomography.
Methods: A prospective observational study was done on subjects aged 3 to 18 years at the Princeton Vision Clinic, Chicago, IL. Scheimpflug tomography (Pentacam HR, OCULUS Optikgerate GmbH) scans (Belin/Ambrósio Enhanced Ectasia BAD3) yielded BAD Final D (Final D) and Back Elevation at the Thinnest Point (BETP) measurements.
Objectives: To report on baseline refractive and keratometric values and their correlation with tomographic characteristics of eyes with keratoconus (KC).
Methods: Retrospective chart review of patients treated in a single-center cornea and refractive surgery practice. Baseline topographic measurements were reviewed for 1,012 keratoconic eyes of 586 patients between 2008 and 2018.
In this report, we discuss contact lens (CL) fitting in a patient with a history of keratoconus (KC), before and after undergoing topography-guided photorefractive keratectomy (TG PRK). Before TG PRK, the patient failed multiple CL modalities and reported difficulty with his habitual CLs and inadequate spectacle-corrected visual acuity to perform his activities of daily living. In this case, a collaborative, comprehensive approach to visual management in a patient with KC was used, and after TG PRK was performed to improve his corneal contour and symmetry, our patient was fit with a standard soft CL and additionally had improved spectacle-corrected visual acuity.
View Article and Find Full Text PDFObjectives: To report on the topographic and visual outcomes 10 years after corneal cross-linking in patients with progressive keratoconus and corneal ectasia after refractive surgery.
Methods: Cross-sectional cohort study of an original, prospective, randomized, clinical trial. Patients treated in a single center cornea and refractive surgery practice as part of the U.
Purpose: To report results of Corneal Tissue Addition Keratoplasty (CTAK) for keratoconus (KC) and ectasia after laser in situ keratomileusis.
Setting: Cornea and refractive surgery practice.
Design: Single center, prospective, open label clinical trial.
This case reports on the use of wavefront-guided (wfg) optics on custom ocular impression-based scleral lenses (IBSLs) for visual improvement in a patient with keratoconus (KC). A 28-year-old man with KC, who had previously failed a traditional, diagnostically fit scleral lens (tSL), was fit with IBSLs with traditional optics. Using a system that included a dot matrix on the IBSL and a wavefront aberrometer with pupil and dot registration software, a wfgIBSL was created.
View Article and Find Full Text PDFPurpose: To report on the use of scleral lens therapy for a patient with lipid keratopathy secondary to rigid gas permeable contact lens wear and ocular surface disease.
Methods: Case report and literature review.
Results: A 40-year-old man with a history of keratoconus and rigid gas permeable contact lens wear, resulting in corneal neovascularization and lipid keratopathy.
Objectives: This case reports on the use of scleral lens therapy for a patient with a descemetocele secondary to exposure and neurotrophic keratopathy.
Methods: Case report and literature review.
Results: A 31-year-old man had undergone emergency surgery to repair a ruptured arteriovenous malformation resulting in left facial and trigeminal nerve palsies.
Purpose: To assess anterior corneal higher-order aberrations (HOAs) after corneal crosslinking (CXL) and intrastromal corneal ring segments (Intacs) used adjunctively.
Setting: Cornea and refractive surgery practice.
Design: Prospective, randomized clinical trial.
Purpose: To quantitate corneal haze and analyze the postoperative time course of corneal haze after transepithelial corneal collagen cross-linking (TECXL) in patients with keratoconus.
Methods: Patients underwent TECXL and were randomized into 2 groups. One group received intraoperative riboflavin 0.
Incidence and associations of intracorneal ring segment explantation.
J Cataract Refract Surg
February 2019
Purpose: To assess the incidence and motivating determinants of explantation of intracorneal ring segments (ICRS) (Intacs) used for the treatment of keratoconus and corneal ectasia.
Setting: Cornea and refractive surgery subspecialty practice.
Design: Retrospective case series.
Purpose: To evaluate outcomes of corneal crosslinking (CXL) using a transepithelial technique for the treatment of keratoconus.
Setting: Cornea and refractive surgery subspecialty practice.
Design: Prospective case series.