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Makoto Inoue, Jiro Hidaka, Akito Hirakata; Restoration of acrylic intraocular lens injected through cartridge. Invest. Ophthalmol. Vis. Sci. 2013;54(15):830.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate the effect of temperature in restoration of acrylic intraocular lenses (IOLs) after injection through a cartridge.
Acrylic IOLs (SA60AT; Alcon, 251; HOYA, YA-65BB; HOYA, W-60, Santen, NX-70; Santen) were loaded or preloaded in a cartridge with viscoelastic material and injected into a water chamber under temperature control at 24 or 34 C°. Wavefront analyzer (LAMBDA-X, NIMO TR0815) was used to measure the form of IOLs. Time to restore the form of the IOLs was defined as Δcylinder power (difference from the baseline) < 0.2 diopter.
All IOLs restored within 2 minutes at 34 C°. At 24 C°, SA60AT and 251 restored within 3 minutes but YA-65BB and W-60 (single-piece) required 3.5 minutes and NX-70 (three piece IOL with same material of W-60) up to 6 minutes. The central optical thickness of NX-70 (7.0 mm diameter) was 0.865 mm and was thicker than that of W-60 (6.0 mm diameter) at 0.640 mm. The cross section of the cartridge for NX-70 was round shape with mean diameter of 2.17 mm and that for W-60 was oval shape with 1.65 mm of mean diameter.
Restoration of IOL was dependent on temperature. However it may depend on the thickness of IOL and inner shape of the cartridge.
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