Table 4.

Change in log MAR Visual Acuity from baseline: A comparison of outcomes for eyes undergoing Boston keratoprosthesis without pars plana vitrectomy to eyes with pars plana vitrectomy^*

	Keratoprosthesis without pars plana vitrectomy			Keratoprosthesis with pars plana vitrectomy			P value
Post-operative time (Months)	Total number of eyes	Number of Eyes Improved 1 or more logMAR	% Eyes Improved 1 or more logMAR	Total number of eyes	Number of Eyes Improved 1 or more logMAR	% Eyes Improved 1 or more logMAR
1	68	41	60%	54	34	63%	0.764
3	60	42	70%	47	31	66%	0.656
6	57	35	61%	47	27	57%	0.682
9	54	31	57%	37	23	62%	0.650
12	55	32	58%	36	21	58%	0.989
Last follow-up	62	27	44%	48	29	60%	0.079
Post-operative time (Months)	Total number of eyes	Number of Eyes Decreased 1 or more logMAR	% Eyes Decreased 1 or more logMAR	Total number of eyes	Number of Eyes Decreased 1 or more logMAR	% Eyes Decreased 1 or more logMAR
1	68	1	1%	54	2	4%	0.583
3	60	2	3%	47	0	0%	0.503
6	57	5	9%	47	3	6%	0.726
9	54	3	6%	37	2	5%	1.000
12	55	3	5%	36	3	8%	0.678
Last follow-up	62	14	23%	48	6	13%	0.217

^*NLP visual acuities excluded from logMAR calculations