Anterior chamber depth measurement before and after photorefractive keratectomy: comparison between IOL master and Orbscan II.
OBJECTIVE
To measure the anterior chamber depth (ACD) with 2 different devices before and after photorefractive keratectomy (PRK).


METHODS
Noncomparative case series.


METHODS
One hundred forty-three eyes of 143 patients who had undergone PRK with refractive errors ranging from -13.13 diopters (D) to +7 D (mean, -3.67+/-3.58) were analyzed.


METHODS
The ACD values preoperatively and at 1, 3, and 6 months postoperatively were measured with the Orbscan II and IOL Master. The results were analyzed using the Pearson correlation.


METHODS
Anterior chamber depth.


RESULTS
The instruments showed good agreement between the measurements before and after surgery. A significant decrease between the preoperative and 1-month postoperative measurements was found in the ACD measured from the epithelium with Orbscan II (P<0.01) and IOL Master (P<0.01). A nonsignificant decrease with both IOL Master (P>0.01) and Orbscan II (P>0.01) was found between 3 and 6 months after surgery. The ACD measured from the endothelium using the Orbscan II showed a significant difference only between the 3- and 6-month follow-up data (P<0.01).


CONCLUSIONS
The 2 devices showed good agreement, and the changes detected postoperatively seem to be related not only to corneal thinning but also to anterior segment remodeling.
Rosa
Nicola
N
Department of Ophthalmology, 2nd University of Naples, Naples, Italy. nicola.rosa@unina2.it
Lanza
Michele
M
Capasso
Luigi
L
Lucci
Marcella
M
Polito
Biagio
B
Romano
Antonio
A
D000293:Adolescent; D000328:Adult; D000867:Anterior Chamber / Q000473:pathology*; D001837:Body Weights and Measures; D003315:Cornea / Q000601:surgery; D003941:Diagnostic Techniques, Ophthalmological / Q000592:standards*; D005260:Female; D006801:Humans; D007368:Interferometry; D054018:Lasers, Excimer; D008027:Light; D008297:Male; D008875:Middle Aged; D018903:Photorefractive Keratectomy; D011182:Postoperative Care; D011300:Preoperative Care; D054140:Refractive Surgical Procedures; D015203:Reproducibility of Results