Ocular biometry in occludable angles and angle closure glaucoma: a population based survey.
OBJECTIVE
To compare ocular biometric values in a population based sample of eyes with occludable angles, angle closure glaucoma, and normal subjects.


METHODS
2850 subjects from a population based glaucoma prevalence study underwent complete ocular examination including indentation gonioscopy. Ocular biometry was performed in all subjects classified to have occludable angles (n = 143); angle closure glaucoma (n = 22), and a random subgroup of 419 normal subjects. Ocular biometry readings between the groups were compared and statistically analysed using "t," "z," and Mann-Whitney U tests.


RESULTS
The mean age among subjects with occludable angles (54.43 (SD 9.53) years) and angle closure glaucoma (57.45 (8.5) years) was significantly higher (p<0.001) than normal subjects (49.95 (9.95) years). Axial length was shorter (p<0.001) in the occludable angle group (22.07 (0.69) mm) compared to the normal group (22.76 (0.78) mm). Anterior chamber depth (ACD) was shallower (p<0.001) among subjects with occludable angles (2.53 (0.26) mm) than normal subjects (3.00 (0.30) mm). Lens thickness (LT) was greater (p<0.001) in people with occludable angles (4.40 (0.53) mm) compared to normal subjects (4.31 (0.31) mm). No significant difference was noted in axial length, ACD (p = 0.451), and LT (p = 0.302) between angle closure glaucoma and occludable eyes.


CONCLUSIONS
South Indian eyes with angle closure glaucoma and occludable angles seem to have significantly shorter axial lengths, shallower anterior chambers and greater lens thickness compared to the normal group.
George
R
R
Glaucoma Project, Vision Research Foundation, Sankara Nethralaya, Chennai, India Marshfield Medical Research Foundation, WI, USA.
Paul
P G
PG
Baskaran
M
M
Ramesh
S Ve
SV
Raju
P
P
Arvind
H
H
McCarty
C
C
Vijaya
L
L
D000328:Adult; D000368:Aged; D000867:Anterior Chamber / Q000473:pathology; D001699:Biometry / Q000379:methods; D005123:Eye / Q000473:pathology*; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000453:epidemiology / Q000208:ethnology / Q000473:pathology*; D006068:Gonioscopy; D006801:Humans; D007194:India / Q000453:epidemiology; D007908:Lens, Crystalline / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D015995:Prevalence; D017678:Sex Distribution