Ciliary body thickness increases with increasing axial myopia.
OBJECTIVE
To assess the relationship between ciliary body thickness and refractive error.


METHODS
Prospective observational case series.


METHODS
We enrolled 75 eyes of 75 patients with no history of intraocular surgery or use of anti-glaucoma medication. Axial length was measured by A-scan ultrasonography. Ciliary body thickness (CBT) was measured by two masked observers on radial-section images of the temporal corneoscleral limbus, acquired with ultrasound biomicroscopy (UBM) at 2 and 3 mm posterior to the scleral spur (CBT2 and CBT3, respectively).


RESULTS
Refractive error was inversely correlated with CBT2 and CBT3 (r = -.64 and r = -.52, P < .0001, respectively). Axial length was correlated with CBT (r = .66 and r = .57, P < .0001, for CBT2 and CBT3, respectively).


CONCLUSIONS
CBT increases with increasing myopia and axial length.
Oliveira
Cristiano
C
Department of Ophthalmology, The New York Eye and Ear Infirmary, New York, New York 10003, USA.
Tello
Celso
C
Liebmann
Jeffrey M
JM
Ritch
Robert
R
D001837:Body Weights and Measures; D002924:Ciliary Body / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D033401:Microscopy, Acoustic; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology*; D011446:Prospective Studies