The second laser, a 20-mW, 1-kHz, 355-nm, and 0.8-ns laser (PowerChip PNV, Teem Photonics, France), was used in one of two configurations for initial exposures of porcine corneas [Fig. 1(c)] and for single-pulse iris damage experiments [Fig. 1(d)]. Here, the power could be adjusted using a half-wave plate and Brewster angle polarized beam splitter, and exposures were set via electronic shutter. For initial porcine cornea testing, a lens was used to collimate the laser output with diameter of 1.1 mm. The beam was kept fixed and spot patterns were delivered by moving the sample via translation stage between exposures. At the experimental average power of 15 mW, the time-averaged spatial peak irradiance on the cornea was . As in previous setups, the cumulative radiant exposure was varied by changing laser exposure duration via the electronic shutter. For iris testing, the collimated output beam was loosely focused to a spot and a scanning mirror (Optics in Motion, Long Beach, California) driven by a function generator was used to separate the laser pulses on the iris into individual spots. Here, the laser pulse energy was directly varied to determine the single-pulse threshold. Two intersecting He–Ne beams (JDS Uniphase, Milpitas, California) were used for iris sample alignment to the focal plane.