Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Virtual reality enhances ophthalmic anatomy learning: experimental evidence on comparable outcomes with peer and expert facilitators.

BMC medical education·2026
Same author

Role of Corneal Screening in Pediatric Patients With Allergic Rhinoconjunctivitis: A Proactive Approach to Preventive Ophthalmology: Initial Report of the CATCH (Capturing Atopic Children) Keratoconus Study Group.

Cornea·2026
Same author

Tomographic and biomechanical corneal characteristics of patients with angioid streaks.

International journal of ophthalmology·2026
Same author

Topographic and biomechanical comparison of diluted alcohol and iontophoresis-assisted versus accelerated corneal crosslinking in keratoconus.

European journal of ophthalmology·2025
Same author

Iontophoresis Corneal Cross-linking With Oxygen Supplementation in Ovine Eyes.

Journal of refractive surgery (Thorofare, N.J. : 1995)·2022
Same author

Comparison of safety and efficacy of silicone hydrogel contact Lens-assisted CXL and accelerated CXL in keratoconus patients with thin corneas.

European journal of ophthalmology·2022

Related Experiment Video

Updated: Jul 12, 2026

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
05:46

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile

Published on: September 20, 2024

Higher-order aberrations and visual acuity after LASEK.

Berrak Urgancioglu1, Kamil Bilgihan, Sertac Ozturk

  • 1Department of Ophthalmology, Gazi University Medical School, Ankara, Turkey. bsekeryapan@yahoo.com

International Ophthalmology
|September 4, 2007
PubMed
Summary

Laser subepithelial keratomileusis (LASEK) increases ocular higher-order aberrations (HOAs) in eyes with supernormal vision. While HOAs increase post-LASEK, this rise doesn't consistently correlate with visual symptoms like glare or halos.

More Related Videos

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
05:14

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

Related Experiment Videos

Last Updated: Jul 12, 2026

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
05:46

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile

Published on: September 20, 2024

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
05:14

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Investigating ocular higher-order aberrations (HOAs) in eyes achieving supernormal vision after myopic astigmatic laser subepithelial keratomileusis (LASEK).
  • Comparing HOA findings in post-LASEK eyes with those in naturally supernormal vision eyes.

Purpose of the Study:

  • To quantify ocular HOAs in eyes with supernormal vision following LASEK.
  • To compare HOA levels between eyes that underwent LASEK and those with natural supernormal vision.

Main Methods:

  • Ocular HOAs were measured in 20 eyes (12 patients) with uncorrected visual acuity (UCVA) >20/16 post-LASEK (Group 1).
  • HOAs were also measured in 20 eyes (10 subjects) with natural UCVA >20/16 as a control (Group 2).
  • Measurements were taken at 4.0 mm and 6.0 mm pupil diameters, analyzing RMS values for various HOAs.

Main Results:

  • Mean RMS values for HOAs were higher in the post-LASEK group (Group 1) compared to the natural supernormal vision group (Group 2) at both pupil sizes.
  • No significant differences were found in spherical and coma aberrations between the groups.
  • Total HOAs showed a statistically significant increase in Group 1 compared to Group 2 at both 4.0 mm and 6.0 mm pupil diameters (P < 0.05).

Conclusions:

  • Ocular higher-order aberrations are present in eyes with supernormal vision.
  • LASEK surgery leads to an increase in ocular HOAs under both mesopic and photopic conditions.
  • The observed increase in HOAs after LASEK does not appear to directly correlate with subjective visual symptoms.