Purpose: To assess the effect of chronic cigarette smoking on corneal and lens densitometry measurements using Pentacam HR and to compare the results obtained with those in non-smokers.
Materials And Methods: This cross-sectional comparative study included 40 chronic-smokers and 40 age-matched healthy non-smokers between 18-40 years. After general ophthalmic examination, the Pentacam HR imaging system was used to evaluate corneal and lens densitometry measurements of smokers and non-smokers.
Results: The mean corneal densitometry values were not statistically significantly different in all the concentric zones and layers in the eyes of the smokers and non-smokers ( > 0.05, for all). However, the mean values of zone 1, zone 2, zone 3 and average lens densitometry measurements of the smokers were statistically significantly higher compared to non-smokers ( < 0.05, for all). Additionally, significant positive correlations were detected between the number of pack-years smoked and lens densitometry measurements.
Conclusion: Lens densitometry measurements of smokers were significantly increased while corneal densitometry measurements were not significantly altered compared to non-smokers. Smoking may contribute to cataractogenesis and smoking and age-related changes may act synergistically to cataract development among smokers.
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http://dx.doi.org/10.1080/15569527.2023.2234023 | DOI Listing |
Invest Ophthalmol Vis Sci
March 2025
College of Optometry, Nova Southeastern University, Davie, Florida, United States.
Purpose: The purpose of this study was to quantify the corneal power changes after wearing orthokeratology lenses of different back optic zone diameters (BOZDs) and to propose a novel 4-parameter model capable of revealing the associations between each parameter and axial length growth (ALG).
Methods: A prospective self-controlled study was conducted between June 2022 and December 2023. One eye in each subject (N = 33) was randomly assigned to wear a lens with a BOZD of either 5 mm (5 oz) or 6 mm (6 oz).
Graefes Arch Clin Exp Ophthalmol
March 2025
Department of Ophthalmology, Sisli Hamidiye Etfal Education and Research Hospital, Halaskargazi Street, 34371, Istanbul, Turkey.
Purpose: To evaluate the modified double-flanged technique in cases of subluxated foldable single-piece intraocular lenses (IOLs).
Methods: This retrospective study was conducted on 14 eyes of 14 patients.The following steps were performed in the surgical technique, respectively;the dislocated foldable single-piece IOL was repositioned into the anterior chamber, and the haptic was extracted through the corneal main incision.
Cont Lens Anterior Eye
March 2025
National Engineering Research Center of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China; National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China; Oujiang Laboratory, Zhejiang Lab for Regenerative Medicine, Vision and Brain Health, Wenzhou 325101, China; Department of Ophthalmology, The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang 621054, China. Electronic address:
Purpose: To investigate the impact of orthokeratology (ortho-k) lenses with different back optic zone diameter (BOZD) on the biomechanical response of the cornea, focusing on contact pressure, displacement, and stress distribution.
Method: Finite element models were developed to simulate varying corneal curvatures (39.0D, 42.
Purpose: To evaluate the clinical and patient-reported outcomes of the toric version of a refractive extended depth of focus intraocular lens (IOL).
Methods: This was a prospective observational study including 26 eyes of 26 patients (age range: 58 to 88 years) who underwent cataract surgery with implantation of the LuxSmart toric IOL (Bausch & Lomb GmbH). Changes in distance, intermediate (80 cm), and near (40 cm) visual acuities, manifest refraction, defocus curve, distance photopic contrast sensitivity (CSV-1000 test), and patient-reported outcomes (Catquest-9SF questionnaire) were evaluated during a 3-month follow-up.
Purpose: To report the visual and tomographic outcomes 1 year after porcine collagen lenticule implantation in eyes with advanced keratoconus.
Methods: Patients older than 18 years with advanced keratoconus having central corneal thickness (CCT) greater than 350 µm and visual acuity of 20/40 or better with contact lens, but intolerant to contact lenses, were included. A femtosecond laser-assisted stromal pocket was created at a depth of 140 µm.
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