EFFECTS OF OPHTHALMIC VEHICLES ON THE STABILITY OF THE PRECORNEAL FILM
1977; Wiley; Volume: 55; Issue: 1 Linguagem: Inglês
10.1111/j.1755-3768.1977.tb06092.x
ISSN1755-3768
Autores Tópico(s)Corneal surgery and disorders
ResumoThe break up time (B. U. T.) of the precorneal film has been studied before and after application of 34 different vehicles. The material examined comprised 646 eyes. Maximum increase of the B. U. T. was obtained with 2% methyl cellulose (four times) and 10% polyvinyl alcohol (seven times). These vehicles in the usually employed concentrations, fat‐free ointment (polyethylene glycol), acetyl cysteine and polysaccharide (dextran) affected a less pronounced prolongation. The B. U. T. was reduced four or five times by fatty, anhydrous ointments and by silicone oil, about two or three times by emulsions and oils, and twice by 0.01% benzalkonium chloride. The clinical significance of the B. U. T. alterations is discussed.
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