Optical quality after posterior chamber Phakic implantation of an intraocular Lens with a central hole (V4c implantable Collamer Lens) under different lighting conditions

Table 2 Changes in optical quality parameters in eyes undergoing V4c ICL implantation under different lighting conditions

Time	Parameter	Bright	Dark	P-value
1 week	ΔOSI	−0.606 ± 0.131	− 0.920 ± 0.207	0.02
	ΔMTF cutoff frequency (cpd)	2.789 ± 1.133	4.187 ± 1.274	0.22
	ΔStrehl ratio	0.013 ± 0.007	0.019 ± 0.006	0.37
	ΔPVA100%	0.099 ± 0.038	0.131 ± 0.042	0.40
	ΔPVA20%	0.060 ± 0.029	0.086 ± 0.033	0.38
	ΔPVA9%	0.032 ± 0.021	0.051 ± 0.019	0.37
1 month	ΔOSI	−0.686 ± 0.120	−1.034 ± 0.217	0.004
	ΔMTF cutoff frequency (cpd)	4.589 ± 1.109	4.462 ± 1.136	0.91
	ΔStrehl ratio	0.018 ± 0.007	0.019 ± 0.007	0.95
	ΔPVA100%	0.164 ± 0.036	0.143 ± 0.046	0.56
	ΔPVA20%	0.111 ± 0.029	0.113 ± 0.035	0.94
	ΔPVA9%	0.049 ± 0.021	0.052 ± 0.021	0.88
3 months	ΔOSI	−0.689 ± 0.121	−1.056 ± 0.217	0.002
	ΔMTF cutoff frequency (cpd)	6.155 ± 1.207	6.627 ± 1.214	0.70
	ΔStrehl ratio	0.025 ± 0.008	0.031 ± 0.007	0.44
	ΔPVA100%	0.212 ± 0.039	0.209 ± 0.041	0.94
	ΔPVA20%	0.136 ± 0.033	0.162 ± 0.032	0.44
	ΔPVA9%	0.078 ± 0.023	0.094 ± 0.023	0.48

ICL implantable collamer lens, MTF modulation transfer function, OSI objective scattering index, PVA predicted visual acuity

ISSN: 1471-2415