Table 3.

Improvement of visual acuity by three or more lines 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
Post-operative time (Months)	Total number of eyes	Number of Eyes Improved 3 or more lines	% Eyes Improved 3 or more lines	Total number of eyes	Number of Eyes Improved 3 or more lines	% Eyes Improved 3 or more lines	P-value
1	68	54	79%	54	40	74%	0.486
3	60	48	80%	47	37	78%	0.871
6	57	46	81%	47	33	70%	0.213
9	54	38	70%	37	27	73%	0.787
12	55	43	78%	36	26	72%	0.516
Last follow-up	62	36	58%	48	37	77%	0.036

^*NLP eyes excluded from analyses