Lasik in hyperopic eyes with congenital nystagmus: a case report

Patients with nystagmus are considered to be poor candidates for laser in situ keratomileusis (LASIK), because they are unable to fixate. This case report presents the first reported use of LASIK surgery with a solid-state laser in hypermetropia and congenital nystagmus. A 23 year old woman with congenital nystagmus had LASIK surgery to correct a refractive error of +2.25/+1.75 90º in the right eye and + 2.00 / +1.75 90º in the left one. Baseline uncorrected visual acuity (UCVA) was 20/200 in both eyes, and best spectacle corrected visual acuity was 20/40 in both the eyes. The procedure was performed using the Nidek MK-2000 microkeratome and a CustomVis solid state laser system. Twenty four hours postoperatively, the patient had a UCVA of 20/50 in each eye which remained unchanged at 1 week and 8 weeks. Conclusion: LASIK surgery using solid state laser was effective in this case of congenital nystagmus. However, more cases should be examined before conclusions can be drawn

Correlation between central corneal thickness measurements using two uifferent ultrasonic pachymeters

Purpose: To assess correlation between central corneal thickness measurements using two different ultrasonic pachymeters. Material and Methods: This prospective study involved normal subjects aged 16 to 45 years. Central corneal thickness was measured in 47 eyes by two ultrasonic pachymeters – Tomey SP – 100 and Sonomed 300 AP. Correlations between CCT measurements assessed by the two pachymeters were tested by Pearson correlation. Results: Forty seven eyes were included in the study. The mean (± SD) age of the subjects was 27.79 years (± 6.88).The mean (± SD) Tomey Pachymeter CCT was 536.45 m (34.37) and the mean (SD) Sonomed CCT was 540.64 m (33.48).CCT measurements by the two modalities were very strongly correlated (r = 0.98; P \u3c0.0001). Conclusions: In healthy individuals, Tomey pachymeter measurements of corneal thickness were highly correlated with those obtained using Sonomed pachymeter, and hence the two may be used interchangeably