Optic disc measurements using the Heidelberg Retina Tomograph in amblyopia

Figures & data

Table Comparison of refraction and Heidelberg Retina Tomography parameters

Comparison between amblyopic and fellow eye
	Resolved amblyopia (34 eyes of 17 subjects)			Persistent amblyopia (54 eyes of 27 subjects)
	Fellow eye	Amblyopic eye	P*	Fellow eye	Amblyopic eye	P*
Refraction (diopters)	1.919 (1.992)	2.971 (3.757)	0.143	1.387 (2.272)	3.742 (4.074)	<0.001
CDAR	0.275 (0.103)	0.267 (0.114)	0.707	0.241 (0.097)	0.207 (0.113)	0.160
RNFLT (mm)	0.191 (0.061)	0.192 (0.058)	0.918	0.250 (0.087)	0.207 (0.049)	0.022
DA (mm^2)	1.967 (0.386)	1.915 (0.383)	0.567	2.210 (0.824)	2.097 (0.692)	0.422
RA (mm^2)	1.418 (0.312)	1.391 (0.272)	0.700	1.652 (0.581)	1.633 (0.474)	0.870
RV (mm^3)	0.288 (0.108)	0.293 (0.105)	0.848	0.426 (0.180)	0.389 (0.162)	0.386
CA (mm^2)	0.548 (0.261)	0.528 (0.300)	0.689	0.557 (0.377)	0.459 (0.349)	0.127
CV (mm^3)	0.107 (0.076)	0.117 (0.078)	0.511	0.105 (0.102)	0.096 (0.104)	0.581
Comparison between the amblyopic eyes of resolved and persistent amblyopia
Refraction	P^†= 0.532
CDAR	P^†= 0.095
RNFLT	P^†= 0.374
DA	P^†= 0.326
RA	P^†= 0.063
RV	P^†= 0.037
CA	P^†= 0.509
CV	P^†= 0.488

Notes: Data are shown as mean (standard deviation). P values are for comparison between amblyopic and fellow eyes* (paired t-test) and between the amblyopic eyes of resolved and persistent amblyopia^† (unpaired t-test). Because of multiple comparisons among the seven Heidelberg Retina Tomograph parameters, Bonferroni correction was applied with a level of significance of 0.0071. Refraction: spherical equivalent values.

Abbreviations: CDAR, cup-to-disc area ratio; RNFLT, retinal nerve fiber layer thickness; DA, disc area; RA, rim area; RV, rim volume; CA, cup area; CV, cup volume.