Necrotizing keratitis after laser refractive surgery in patients with inactive inflammatory bowel disease.

Two cases of necrotizing keratitis following laser refractive corneal surgery, with stable and controlled Crohn's disease are described. A 40-year-old woman developed bilateral stromal inflammation and inferior thinning in the right eye along the flap edge within 1 day of uneventful bilateral IntraLase laser-assisted in situ keratomileusis. The other case is a 30-year-old man who also developed bilateral inferior stromal infiltrates 2 days following photorefractive keratectomy.

Small spot phototherapeutic keratectomy for recurrent corneal erosion.

Purpose: To describe small spot phototherapeutic keratectomy (PTK) using the NIDEK EC-5000 excimer laser for the treatment of recurrent corneal erosion.

Methods: This retrospective study analyzed patients with recurrent comeal erosion who were treated using small spot PTK. An electronic medical records database was used to retrieve patient data.

Assessment of nerve fiber layer thickness before and after laser in situ keratomileusis using scanning laser polarimetry with variable corneal compensation.

Purpose: To determine the effect of laser in situ keratomileusis (LASIK) on retinal nerve fiber layer (RNFL) thickness measurements obtained by scanning laser polarimetry with variable corneal compensation (SLP-VCC).

Setting: Gimbel Eye Centre, Calgary, Alberta.

Methods: Retinal nerve fiber layer thickness measurements were performed in both eyes of 25 consecutive healthy patients the day of LASIK surgery and 1 month after by trained examiners using the GDx-VCC nerve fiber analyzer.

Retrospective analysis of actual LASIK flap diameter compared with microkeratome ring size performed by different surgeons.

Purpose: To evaluate the difference in the diameter between microkeratome ring and actual laser in situ keratomileusis (LASIK) flap size by 4 different surgeons using 3 different microkeratomes in comparison to preoperative keratometry.

Setting: Gimbel Eye Centre, Calgary, Alberta, Canada.

Methods: A retrospective analysis of 6667 consecutive LASIK surgeries performed at the Gimbel Eye Centre between 1998 and 2002 was conducted.

Wavefront-guided multipoint (segmental) custom ablation enhancement using the Nidek NAVEX platform.

Purpose: To present our clinical experience regarding enhancement (retreatment) of previously performed non-wavefront-guided refractive surgery by wavefront-guided multipoint (segmental) custom ablation utilizing the Nidek NAVEX platform.

Methods: Retrospective clinical analysis was conducted of 20 eyes (19 patients) with mixed myopic or hyperopic astigmatism who had undergone primary laser in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK) and reported postoperative reductions in quality of vision. These vision disturbances correlated with clinically significant elevations in the root mean square of higher order aberrations (RMS of HOA) values.

Primary multipoint (segmental) custom ablation.

Purpose: We present our experience in resolving visual symptoms in refractive patients undergoing primary multipoint (segmental) custom ablation.

Methods: Twelve eyes with mixed myopic astigmatism underwent evaluation and primary treatment by multipoint (segmental) custom ablation for the correction of refractive errors and visual symptoms using the Nidek NAVEX platform.

Results: Twelve eyes showed resolution of visual symptoms following diagnosis and treatment with MCA using the NAVEX platform.