Table 1

 Factors affecting the postoperative recovery in visual field deficits

VariableVF returned to normalVF improved
Values are mean (SEM) or n (%). The recovery in VF deficits was classified as improved (n = 49 eyes) or returned to normal (n = 29 eyes).
*p<0.05 v VF returned to normal; unpaired Student’s t test or Mann–Whitney U test.
VF, visual fields.
n (%)29 (36%)49 (60%)
Age (years)54.1(3.0)55.8 (2.0)
Duration of symptoms preoperatively (weeks)17 (5)137 (56)*
Preoperative visual acuity (median)6/66/9*
Presence of optic atrophy (%)7 (24%)15 (31%)
Macroscopic clearance of tumour (%)16 (55%)29 (59%)
Postoperative radiotherapy (%)8 (28%)21 (43%)