Figure 5.

The optical transmittance/haze test and in vitro cytotoxicity test of the smart contact lens

(A) Schematic illustration of optical transmittance testing.

(B) Optical transmittance (black) and haze (red) spectra from 400 to 800 nm.

(C) Optical properties at 55 nm as a function of tensile strain up to 30%.

(D) The optical images (upper) and fluorescent images (lower) of the HUVECs at different times. In a live/dead assay, green and red fluorescence indicate living and dead cells, respectively.

(E) The average viability (percent of living cells) at days 1, 4, and 7. The percentage of living cells remained the same during the 7 days.

(F) Cell count (number of cells per area) at different times. The increasing number of living cells demonstrates cell culture reliability.