Following the previous study observing keratoconjunctivitis sicca (KCS) after treated follicular conjunctivitis of chlamydial etiology from the years 1999-2002, at this time the authors would like to point out the possible connection between KCS appearance and Chlamydia pneumoniae infection. In the Department of Ophthalmology, during the period of 12 months (in the years 2009 - 2010), there were treated 11 adult patients (6 women and 5 men) in the age of 28 - 81 years (median, 50 years) with follicular conjunctivitis lasting on average 2.5 years and caused by Chlamydia pneumoniae, and simultaneously were diagnosed the symptoms of KCS, out of the total number of 37 examined patients with similar clinical findings