Anterior Ischemic Optic Neuropathy and Intraocular Pressure

To the Editor. —I have often read "Correspondence" in which researchers bristle when other researchers fail to replicate prior work or draw different conclusions about the same clinical events, and honest men do disagree. I have not with-stood the temptation to view such correspondence as defensive, petty, whiny, and self-serving. I apologize for my own hypocrisies. The report by Kalenak et al 1 in the May 1991 issue of theArchivespurportedly demonstrating no association between anterior ischemic optic neuropathy (AION) and elevated intraocular pressure (IOP) troubles me for several reasons. I believe such a conclusion is not warranted on the basis of the data reported. I am troubled by the criteria Kalenak et al used for diagnosing AION; although a combination of criteria was used, it is not clear if all patients fulfilled all criteria; the implication is that not all patients fulfilled all criteria. I am troubled with