Toric collagen copolymer phakic intraocular lens to correct myopic astigmatism in eyes with pellucid marginal degeneration
Bibliographic record
Abstract
PURPOSE: To evaluate the clinical outcomes of implantation of the Implantable Collamer Lens collagen copolymer toric phakic intraocular lens (pIOL) to correct myopic astigmatism in eyes with mild pellucid marginal degeneration (PMD). SETTING: Gimbel Eye Centre, Calgary, Alberta, Canada. DESIGN: Retrospective chart review. METHODS: All consecutive cases with PMD that had implantation of the toric pIOL from January 1, 2003, to May 30, 2011, were retrospectively reviewed for postoperative outcomes. Perioperative variables of interest included uncorrected (UDVA) and corrected (CDVA) distance visual acuities, manifest refraction, and corneal topography. RESULTS: The study comprised 10 eyes of 5 patients. The mean age was 37.4 years ± 2.6 (SEM). The mean CDVA was 0 ± 0.03 logMAR (20/20) preoperatively and -0.04 ± 0.03 logMAR (20/18) postoperatively. The mean postoperative UDVA was +0.14 ± 0.05 logMAR (20/28). The mean spherical equivalent (SE) was -6.71 ± 0.9 diopters (D) preoperatively and -0.58 ± 0.1 D at the last follow-up. All eyes had improved CDVA after surgery. One patient reported severe glare and halos in 1 eye postoperatively, requiring removal and replacement of the toric pIOL because of a hyperopic refractive surprise. The new toric pIOL was subsequently repositioned because of high residual astigmatism related to changes in corneal topography postoperatively and a small shift in the position of the toric pIOL. The final manifest refraction for this eye was plano -1.00 × 160. CONCLUSIONS: Implantation of the collagen copolymer toric pIOL was a safe, effective surgical procedure for the correction of myopic astigmatism in eyes with mild PMD.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".