Astigmatism

• CLINICAL_TRIALS withdrawal · 2026-03-19
  Clinical Trial Update: Comparison of Phacoemulsification and Corneal Damage Between FLACS and Standard Phaco With Two Handpieces [NA]

  A clinical trial comparing FLACS versus standard phaco with two-handpiece technique for cataract surgery and related corneal outcomes has be…

• CLINICAL_TRIALS withdrawal · 2025-02-03
  Clinical Trial Update: Complete Easy Rub Comparative Efficacy Study [NA]

  Clinical trial update indicates the study has been withdrawn. It concerns refractive errors of the eye—myopia, hyperopia, and astigmatism.

• CLINICAL_TRIALS withdrawal · 2016-12-02
  Clinical Trial Update: Performance of a Photoscreener for Vision Screening in a Haitian Pediatric Population

  A pediatric vision-screening trial evaluating a photoscreener in Haiti has been withdrawn.

• CLINICAL_TRIALS withdrawal · 2014-05-02
  Clinical Trial Update: Surgical Correction of Astigmatism [NA]

  A clinical trial evaluating surgical correction of astigmatism has been withdrawn.

• CLINICAL_TRIALS withdrawal · 2012-08-02
  Clinical Trial Update: Investigation of Corneal Aberrations and Visual Outcomes in Patients Implanted With an AcrySof Toric Intraocular Lens (IOL) [NA]

  A clinical trial evaluating corneal aberrations and visual outcomes after implantation of an AcrySof Toric intraocular lens in cataract pati…

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• CLINICAL_TRIALS withdrawal · 2011-12-08
  Clinical Trial Update: A Study to Evaluate the Safety and Effectiveness of the 217z Laser With Zyoptix for Lasik [NA]

  This clinical trial evaluating the safety and effectiveness of the 217z laser with Zyoptix for LASIK was withdrawn.