Toric outcomes: Computer-assisted registration versus intraoperative aberrometry

Jonathan D. Solomon, John Ladas

Research output: Contribution to journalArticle

Abstract

Purpose To compare refractive outcomes of intraoperative computer-assisted registration and intraoperative aberrometry for the reduction of cylinder during toric intraocular lens (IOL) placement. Setting Bowie Vision Institute, Bowie, Maryland, USA. Design Prospective randomized case series. Method The patients were divided into 2 groups that had toric IOL implantation after phacoemulsification. The intraoperative computer-assisted registration group (Group 1) had preoperative toric calculations. The aberrometry group (Group 2) was guided by a vergence formula and intraoperative pseudophakic cylindrical measurements to determine the final IOL power and intended orientation. The primary outcome measure was the mean postoperative remaining refractive astigmatism, and it was compared with the predicted amount of cylindrical correction with the IOL. Results Fifty-two patients (104 eyes) had sequential cataract surgery. The mean amount of cylinder correction was 1.60 diopters (D) ± 0.70 (SD) (range 0.75 to 3.08 D) in Group 1 and 1.74 ± 0.79 D (range 0.72 to 3.08 D) in Group 2. The mean remaining refractive astigmatism was −0.29 ± 0.22 D in Group 1 and −0.46 ± 0.25 D in Group 2 (P =.0003). A difference vector of 0.1 @ 87 degrees (0.31 D arithmetic mean) was calculated in Group 1 and 0.0 @ 82 degrees (0.44 D arithmetic mean) in Group 2. The correction index was 1.03 in Group 1 and 0.95 in Group 2. Conclusion Intraoperative markerless computer-assisted registration and biometric guidance summarily yielded less remaining refractive cylinder than toric IOL placement guided by intraoperative aberrometry.

Original languageEnglish (US)
Pages (from-to)498-504
Number of pages7
JournalJournal of Cataract and Refractive Surgery
Volume43
Issue number4
DOIs
StatePublished - Apr 1 2017
Externally publishedYes

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Aberrometry
Intraocular Lenses
Astigmatism
Intraocular Lens Implantation
Phacoemulsification
Cataract
Outcome Assessment (Health Care)

ASJC Scopus subject areas

  • Surgery
  • Ophthalmology
  • Sensory Systems

Cite this

Toric outcomes : Computer-assisted registration versus intraoperative aberrometry. / Solomon, Jonathan D.; Ladas, John.

In: Journal of Cataract and Refractive Surgery, Vol. 43, No. 4, 01.04.2017, p. 498-504.

Research output: Contribution to journalArticle

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abstract = "Purpose To compare refractive outcomes of intraoperative computer-assisted registration and intraoperative aberrometry for the reduction of cylinder during toric intraocular lens (IOL) placement. Setting Bowie Vision Institute, Bowie, Maryland, USA. Design Prospective randomized case series. Method The patients were divided into 2 groups that had toric IOL implantation after phacoemulsification. The intraoperative computer-assisted registration group (Group 1) had preoperative toric calculations. The aberrometry group (Group 2) was guided by a vergence formula and intraoperative pseudophakic cylindrical measurements to determine the final IOL power and intended orientation. The primary outcome measure was the mean postoperative remaining refractive astigmatism, and it was compared with the predicted amount of cylindrical correction with the IOL. Results Fifty-two patients (104 eyes) had sequential cataract surgery. The mean amount of cylinder correction was 1.60 diopters (D) ± 0.70 (SD) (range 0.75 to 3.08 D) in Group 1 and 1.74 ± 0.79 D (range 0.72 to 3.08 D) in Group 2. The mean remaining refractive astigmatism was −0.29 ± 0.22 D in Group 1 and −0.46 ± 0.25 D in Group 2 (P =.0003). A difference vector of 0.1 @ 87 degrees (0.31 D arithmetic mean) was calculated in Group 1 and 0.0 @ 82 degrees (0.44 D arithmetic mean) in Group 2. The correction index was 1.03 in Group 1 and 0.95 in Group 2. Conclusion Intraoperative markerless computer-assisted registration and biometric guidance summarily yielded less remaining refractive cylinder than toric IOL placement guided by intraoperative aberrometry.",
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