Table 1.

Details of Surgical Implantation and Measurement Data for Each Subject

Subject	Age at Implantation	Implanted Eye	Preoperative VA (Implanted)	Preoperative VA (Nonimplanted)	Data Range (days)	Electrode Size (μm)
S1	76	R	NLP	LP	1087	520
S2	56	L	LP	LP	1299	520
S3	74	R	NLP	NLP	833	260
S4	60	L	LP	LP	154	260/520
S5	59	R	LP	LP	656	260/520
S6	55	R	NLP	NLP	621	260/520

Acuities were based on the ability to detect a handheld light. When a Ganzfeld or photographic flash was used, all subjects were capable of seeing light. The eye requiring higher light levels to achieve perception was deemed less sensitive. VA, visual acuity; NLP, no light perception; LP, light perception.