[Comparison of central visual field visualization while using a combination of spherical intraocular lenses with vitreous contact lenses].
OBJECTIVE
To investigate intraocular lens (IOL) and vitreous contact lens (VCL) combinations that provide good central visual field visualization in vitreous surgery.


METHODS
ZEMAX optical design software was used to perform optical simulations using the ray tracing method on a Gullstrand eye model. The implanted IOL was assumed to consist of material with a refractive index of 1.550 (high refractive index acrylic IOL), 1.470 (low refractive index acrylic IOL) and 1.413 (silicon IOL), and was set as a biconvex spherical lens (optical diameter 6 mm, 23.5 D). The VCL was assumed to have a refractive index of 1.900 (HEMA VCL), 1.490 (PMMA VCL) and 1.413 (silicon VCL), and was set as a concave lens (optical diameter 10 mm) with a flat anterior surface and a posterior surface with a radius of curvature of 7.70 mm. The spherical aberration of the overall optical system, including the IOL-implanted eyeball and the VCL, was calculated.


RESULTS
Spherical aberration was lowest with the silicon VCL for the high refractive index acrylic IOL and with the PMMA VCL for the low refractive index acrylic and silicon IOLs.


CONCLUSIONS
The combinations providing the best central visual field visualization in vitreous surgery are a silicon VCL for implantation of a high refractive index acrylic IOL and a PMMA VCL for implantation of a low refractive index acrylic or silicon IOL.
Department of Ophthalmology, Social Insurance Chukyo Hospital, Nagoya, Japan. kaga@chukyogroup.jp
Tatsushi
T
Kaga
Hiroshi
H
Uozato
Takushi
T
Kawamorita
Norihiko
N
Yoshida
D000180:Acrylic Resins; D003261:Contact Lenses; D007910:Lenses, Intraocular; D008962:Models, Theoretical; D014794:Visual Fields
D000180:Acrylic Resins