PURPOSE To evaluate the efficacy of intracameral phenylephrine (IPH) administered as prophylaxis against intraoperative floppy iris syndrome (IFIS) and to analyze the ability of IPH to reverse IFIS. DESIGN Prospective, multicenter, randomized, comparative case series of fellow eyes. PARTICIPANTS Forty-two patients receiving tamsulosin who underwent cataract surgery between January and April...

The study of human consciousness has historically depended on introspection. However, introspection is constrained by what can be remembered and verbalized. Here, we demonstrate the utility of high temporal resolution pupillometry to track the locus of conscious attention dynamically, over a single trial. While eye-tracked, participants heard several musical clips played diotically (same music ...

The size of the human pupil increases as a function of mental effort. However, this response is slow, and therefore its use is thought to be limited to measurements of slow tasks or tasks in which meaningful events are temporally well separated. Here we show that high-temporal-resolution tracking of attention and cognitive processes can be obtained from the slow pupillary response. Using automa...

Measurement of pupil size (pupillometry) has recently gained renewed interest from psychologists, but there is little agreement on how pupil-size data is best analyzed. Here we focus on one aspect of pupillometric analyses: baseline correction, i.e., analyzing changes in pupil size relative to a baseline period. Baseline correction is useful in experiments that investigate the effect of some ex...

ALTHOUGH the use of acetylcholine as a miotic agent in ophthalmic surgery is not new, it has not been widely used in the United States nor has it been readily available. Amsler and Verrey (1949) recorded the rapid miotic effect of acetylcholine instilled into the anterior chamber and suggested its use as a possible therapeutic agent after cataract extraction. Acetylcholine acts directly on the ...