Evaluation of Disk Halo Size after Implantation of a Collamer Lens with a Central Hole (ICL V4c)

Table 2

Time course of halo radius and pupillary responses to light after implantation of ICL V4c.

Variables	Preoperation		Postoperative 1 week		Postoperative 1 month		Postoperative 3 months
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Halo radius (arc minutes)	187.38	86.90	148.33	48.18	122.62	40.55	104.76	36.11	<0.001
Initial pupil diameter (mm)	5.06	0.69	4.96	0.63	4.89	0.63	4.84	0.57	0.005
Amplitude of contraction (mm)	1.87	0.31	1.59	0.30	1.58	0.31	1.58	0.29	<0.001
Latency of contraction (ms)	241.36	66.42	232.26	55.99	230.55	72.94	246.62	54.94	0.603
Duration of contraction (ms)	609.19	84.97	635.86	83.62	654.00	118.25	623.00	94.46	0.302
Velocity of contraction (mm/s)	6.24	0.88	5.07	0.88	4.95	1.03	4.96	0.90	<0.001
Latency of dilation (ms)	850.55	58.26	868.12	71.79	870.64	68.57	867.48	67.23	0.130
Duration of dilation (ms)	1563.57	130.41	1606.64	79.94	1562.29	99.88	1578.67	109.89	0.139
Velocity of dilation (mm/s)	2.51	0.64	2.07	0.25	2.13	0.39	2.11	0.39	<0.001
Maximum pupil diameter (mm)	5.41	0.69	5.32	0.60	5.30	0.56	5.22	0.54	0.021
Minimum pupil diameter (mm)	3.14	0.44	3.31	0.47	3.25	0.42	3.20	0.36	0.001
Average pupil diameter (mm)	4.48	0.62	4.52	0.57	4.49	0.51	4.42	0.46	0.249

represents the values of comparison among preoperative values and postoperative 1-week, 1-month, and 3-month values.