During a recent visit to some of the continental clinics, I was impressed by the disparity in age between the patients operated on for senile cataract there and at home. In order to determine whether that was merely an impression or whether such a disparity really existed, I sent a letter to a few of the leading ophthalmic surgeons in various parts of the world asking for the ages in their last 500 or 100 cases of senile cataract extraction, excluding juvenile, traumatic and complicated cataracts. The following surgeons were kind enough to reply, at the same time authorizing me to utilize their statistics: Benedict of Rochester, Derby of Boston, Ellett of Memphis, Elschnig of Prague, Kalt of Paris, Knapp of New York, Meller of Vienna. Sinclair of Edinburgh, Van der Hoeve of Leiden, Wessely of Munich, and Wright of Madras.
A compilation of the statistics gleaned from these sources
GRADLE HS. THE AGE OF PATIENTS OPERATED ON FOR SENILE CATARACT. JAMA. 1930;95(11):774-775. doi:10.1001/jama.1930.02720110010004