Ophthalmology: For many years, the conventional wisdom- which made a lot of sense- was that pigment dispersion syndrome is due to posterior bowing of the iris against the zonules, and therefore an iridotomy would halt further pigment dispersion by equalizing the pressure gradient and making the iris more flat. A recent study, however, noted no decrease in progression to glaucoma among those who got the laser compared to those who didn’t. Oh well.