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Related Concept Videos

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.
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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...

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Related Experiment Video

Updated: Jun 26, 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

[Visual quality after custom versus standard LASIK retreatment].

Andréia Peltier Urbano1, Walton Nosé

  • 1Curso de Pós-Graduação em Oftalmologia e Ciências Visuais da Universidade Federal de São Paulo - São Paulo (SP) - Brasil. andreiaurbano@terra.com.br

Arquivos Brasileiros De Oftalmologia
|January 27, 2009
PubMed
Summary

Wavefront-guided LASIK retreatment improved visual quality, including glare and contrast sensitivity, compared to standard LASIK for myopia and myopic astigmatism.

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

Published on: September 16, 2025

Related Experiment Videos

Last Updated: Jun 26, 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
  • Refractive Surgery

Context:

  • Laser-Assisted In Situ Keratomileusis (LASIK) is a common procedure for correcting myopia and myopic astigmatism.
  • Retreatment may be necessary to address residual refractive errors after primary LASIK.
  • Evaluating visual quality after retreatment is crucial for patient satisfaction and outcomes.

Purpose:

  • To compare the visual quality outcomes of wavefront-guided LASIK versus standard LASIK in eyes requiring retreatment for primary LASIK.
  • To assess differences in glare and contrast sensitivity between the two LASIK retreatment methods.

Summary:

  • A prospective, paired-eye study involved 74 eyes undergoing LASIK retreatment.
  • One eye of each patient received wavefront-guided ablation (Zyoptix), while the fellow eye received standard ablation (PlanoScan).
  • Visual quality, including glare and contrast sensitivity, was evaluated at a 6-month follow-up, with wavefront-guided LASIK demonstrating superior results.

Impact:

  • Wavefront-guided LASIK offers enhanced visual quality compared to standard LASIK for retreatment procedures.
  • These findings support the use of wavefront technology to optimize outcomes in LASIK retreatment for myopia and myopic astigmatism.
  • Improved visual quality can lead to better functional vision and patient satisfaction after refractive surgery retreatment.