Effect of water-in-oil microemulsions and lamellar liquid crystalline systems on the precorneal tear film of albino New Zealand rabbits | Zendy

Raid G. Alany | Zendy

Open Access

Effect of water-in-oil microemulsions and lamellar liquid crystalline systems on the precorneal tear film of albino New Zealand rabbits

Author(s) -

Raid G. Alany

Publication year - 2008

Publication title -

clinical ophthalmology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.025

H-Index - 56

eISSN - 1177-5483

pISSN - 1177-5467

DOI - 10.2147/opth.s2032

Subject(s) - microemulsion , chromatography , aqueous solution , tears , ophthalmology , evaporation , materials science , chemistry , pulmonary surfactant , medicine , surgery , organic chemistry , biochemistry , physics , thermodynamics

The aim of this study is to investigate the effect of phase transition water-in-oil (w/o) microemulsions (ME) and liquid crystalline systems (LC) on the precorneal tear film (PCTF). The study used six albino NZ rabbits and monitored the integrity and stability of the PCTF before and after instillation of test formulations. The effects were evaluated by assessment of the PCTF lipid layer using interferometry, tear evaporation rate measurements, and indirect estimation of tear volume. Ocular application of test formulations changed the appearance of the PCTF lipid layer, indicating lipid layer disruption. The recovery time was longer in case of ME compared with an aqueous solution (SOL). The tear evaporation rate was increased after application of both ME and LC systems compared with the SOL, with the LC system showing the greatest effect. Tear volume measurement results revealed minimal changes associated with the instillation of both ME systems. Whilst phase transition w/o ME systems can interact with the PCTF lipid layer in albino New Zealand rabbits, their effect on the volume of resident tears was found to be minimal.

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