Aho VV, Holopainen JM, Tervo T, Moilanen JAO, Nevalainen T, Saari KM. Group IIA phospholipase A(2) content in tears of patients having photorefractive keratectomy.
J Cataract Refract Surg 2004;
29:2163-7. [PMID:
14670426 DOI:
10.1016/s0886-3350(03)00419-x]
[Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE
To study the effect of photorefractive keratectomy (PRK) on the concentration of group IIA phospholipase A(2) (GIIAPLA(2)) in tears.
SETTING
Departments of Ophthalmology and Pathology, University of Turku, Turku, and Helsinki University Eye Hospital, Helsinki, Finland.
METHODS
Tear samples were collected from 25 eyes of 23 patients (mean age 32.3 years +/- 8.6 [SD]) preoperatively and 2 and 7 days after PRK. The GIIAPLA(2) concentration in the tears was measured by time-resolved fluoroimmunoassay.
RESULTS
The GIIAPLA(2) concentration was significantly lower and the tear fluid flow rate significantly higher 2 days after PRK than preoperatively. At 7 days, the GIIAPLA(2) concentration and the tear fluid flow-corrected excretion of GIIAPLA(2) were significantly higher than preoperatively and at 2 days. The tear flow rate was also significantly higher than preoperatively.
CONCLUSIONS
The GIIAPLA(2) content in tears decreased 2 days after PRK due to dilution of the GIIAPLA(2) content during hypersecretion of reflex tears. Photorefractive keratectomy caused an increase in the tear flow rate, GIIAPLA(2) concentration, and tear fluid flow-corrected excretion of GIIAPLA(2) in tears 7 days after surgery, enhancing the protection of tears against bacterial infections.
Collapse