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Fig. 6 | BMC Ophthalmology

Fig. 6

From: How does the world appear to patients with multifocal intraocular lenses?: a mobile model eye experiment

Fig. 6

Near target. With the monofocal IOL, the ETDRS chart continued to blur as it approached from a distance of 95 cm (A-1). ETDRS chart image at 40 cm from the model eye use for quantitative analysis. Intensity profile from the center of character ‘O’ in the ETDRS chart showed that the intensity of pixels decreased until the measurement point reached the dark ink line of character ‘O’. And it increased again as the measurement point moved out. But, the slope was not steep (A-2). The contrast of character ‘O’ was 27.3%. With ReSTOR, the ETDRS chart blurred as it got closer, but became clear again at a distance of around 40 cm. However, halos were observed around the letters (B-1). Intensity profile showed steeper slope around the dark ink line of character ‘O’ than monofocal IOL (B-2). The contrast of character ‘O’ was 30.4%. With Tecnis multifocal IOL, the ETDRS chart blurred as it got closer, but became clear at a distance of around 36 cm. It was clearer than with ReSTOR, though with faint halos around the letters (C-1). Intensity profile showed steeper slope around the dark ink line of character ‘O’ than ReSTOR (C-2). The contrast of character ‘O’ was 33.9% (This figure was created by Ho Sik Hwang)

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