Table 3. RMSE for each VRQoL task and overall VRQoL score.

QoVL Task	VA (worse eye)	VA (better eye)	MD	MR	Random Forest
‘Letters’ and ‘Sentences’	0.98**	1.03**	0.94**	1.38**	0.84
‘Walking’	0.38**	0.43**	0.34**	0.49**	0.30
‘Going out’	0.40**	0.46**	0.42**	0.54**	0.32
‘Dining’	0.37*	0.40**	0.38*	0.52**	0.33
Overall	2.49**	2.77**	2.42**	3.38**	1.97

Each value is calculated as the absolute difference between predicted VRQoL score and the actual VRQoL score in the testing dataset in the leave-one-out cross validation. RMSE: root mean of the squared prediction error, VRQoL: vision-related quality of life, VA (worse-eye): visual acuity of the eye with worse mean deviation (MD), VA (better-eye): visual acuity of the eye with better MD, MR: Multiple regression with VA (better-eye), VA (worse-eye) and MD of IVF (Integrated Visual Field) (**: p<0.05, *: p<0.01, in comparison with Random Forest, ten fold cross validation).