Efficacy of a Secondary Trifocal Sulcus IOL in Providing Near and Intermediate Vision in Patients with Prior Myopic Laser Vision Correction and Cataract Surgery

Figures & data

Figure 1 The AddOn^® trifocal sulcus lens (courtesy 1stQ GmbH, used with permission).

Table 1 Demographics and LASIK/Cataract History (25 Eyes of 13 Subjects)

		n	Average	SD	Minimum	Maximum
Prior to LASIK	Sphere	21	−3.42	1.70	−6.50	−1.25
	Cylinder	10	−0.60	0.45	−1.35	−0.25
	Spherical equivalent	21	−3.57	1.67	−6.50	−1.50
Primary IOL	Sphere	25	20.6	2.1	16.5	24.5
	Cylinder	16	1.22	0.26	1.00	1.50

Abbreviations: SD, standard deviation; LASIK, laser in situ keratomileusis.

Table 2 Refractive Data Before and After Trifocal Sulcus IOL Implantation

		Mean	SD	Minimum	Maximum	p value
Refractive cylinder (D)	Before	−0.21	0.25	−0.75	0.00	0.02
	After	−0.40	0.35	−1.25	0.00
Spherical equivalent (D)	Before	0.13	0.24	−0.25	0.75	0.01
	After	−0.11	0.34	−1.25	0.38

Abbreviations: D, diopter; SD, standard deviation.

Table 3 Cumulative Monocular Visual Acuity Results by Distance and Correction (n = 25)

		Cumulative Visual Acuity
	Snellen	20/16	20/20	20/25	20/32	20/40	20/63	20/80
	logMAR	−0.1	0	0.1	0.2	0.3	0.4	0.5
Uncorrected	Distance (4 m)	12%	36%	76%	88%	92%	96%	100%
	Intermediate (60 cm)	0%	0%	24%	60%	72%	96%	96%
	Near (40 cm)	0%	32%	60%	80%	92%	100%	100%
Distance corrected	Distance (4 m)	32%	76%	92%	100%	100%	100%	100%
	Intermediate (60 cm)	4%	8%	40%	68%	72%	100%	100%
	Near (40 cm)	0%	44%	84%	92%	96%	100%	100%

Abbreviation: logMAR, log of the minimum angle of resolution.

Figure 2 Monocular visual acuity by correction and distance.

Abbreviation: logMAR, log of the minimum angle of resolution.

Table 4 Binocular Visual Acuity Results (n = 13)

Status	Distance	logMAR Acuity (Lower is Better)
		Mean	SD	Minimum	Maximum
Uncorrected	Distance (4 m)	−0.05	0.11	−0.2	0.1
	Intermediate (60 cm)	0.09	0.10	−0.1	0.26
	Near (40 cm)	0.04	0.09	−0.08	0.22
Distance Corrected	Distance (4 m)	−0.08	0.10	−0.22	0.1
	Intermediate (60 cm)	0.10	0.15	−0.18	0.32
	Near (40 cm)	0.02	0.09	−0.12	0.2

Abbreviations: SD, standard deviation; logMAR, log of the minimum angle of resolution.

Figure 3 Monocular defocus curve.

Abbreviations: logMAR, log of the minimum angle of resolution; D, diopter.