Page 249 - Optofluidics Fundamentals, Devices, and Applications

224 Cha pte r Ni ne

0.05 mm

0.04 mm

(a) (b)
FIGURE 9-19 Pictures taken by pseudoaphakic eye with a fl uidic IOL. (a) 1951 USAF
target (Edmund Optics) is placed at 25 cm away. Features as small as 0.04 mm
can be resolved by our device. (b) Resized eye chart at a distance of 3.7 m. It
shows a visual acuity better than 20/20. (W. Qiao, F. Tsai, S. H. Cho, and Y.-H. Lo,
“Fluidic intraocular lens with a large accommodation range,” IEEE Photonic
Technology Letters, copyright (year) IEEE.)

Object distance: 3.8 m Object distance: 45 cm
(a) (b)
FIGURE 9-20 (a) Image of still fruits 3.8 m away from the pseudoaphakic eye. (b) Image
of green beans 45 cm away from the pseudoaphakic eye. (W. Qiao, F. Tsai, S. H. Cho,
and Y.-H. Lo, “Fluidic intraocular lens with a large accommodation range,” IEEE
Photonic Technology Letters, copyright (year) IEEE.)

shows the image of a 1951 U.S. Air Force (USAF) target obtained from
the eye model with a fluidic IOL. A resolution of 0.04 mm at an object
distance of 25 cm has been achieved. This is about twice the resolu-
tion of an emmetropia eye, which can resolve 0.04 mm features from
a distance of 13 cm. The eye chart shown in Fig. 9-19b has been resized
following the calibration chart and placed at 3.7 m from the corneal
lens. The result demonstrates that the pseudoaphakic eye model with
fluidic IOL has a visual acuity better than 20/20 at 3.7 m. 20/20 is the