Dynamics of tear fluid desiccation on a glass surface: a contribution to tear quality assessment
Biol. Res
;
47: 1-10, 2014. ilus, graf
Artigo
em Inglês
| LILACS
| ID: biblio-950721
ABSTRACT
BACKGROUND:
Fern-like crystalloids form when a microvolume of tear is allowed to dry out at ambient conditions on a glass surface. Presence of crystalloids in tear "microdesiccates" is used to evaluate patients with Dry-Eye disease. This study aims to examine morphologically the desiccation process of normal tear fluid and to identify changes associated with accelerated tear evaporation. Tear microdesiccates from healthy (Non-Dry Eye) and Dry Eye subjects were produced at ambient conditions. Microdesiccate formation was monitored continuously by dark-field video microscopy. Additionally, accelerated desiccation of tear samples from healthy subjects was conducted under controlled experimental conditions. Particular morphological domains of tear microdesiccates and their progressive appearance during desiccation were compared.RESULTS:
In normal tear microdesiccates, four distinctive morphological domains (zones I, II, III and transition band) were recognized. Stepwise formation of those domains is now described. Experimentally accelerated desiccation resulted in marked changes in some of those zones, particularly involving either disappearance or size reduction of fern-like crystalloids of zones II and III. Tear microdesiccates from Dry Eye subjects may also display those differences and be the expression of a more synchronous formation of microdesiccate domains.CONCLUSION:
Morphological characteristics of tear microdesiccates can provide insights into the relative rate of tear evaporation.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Lágrimas
/
Dessecação
/
Vidro
Tipo de estudo:
Estudo diagnóstico
/
Estudo prognóstico
Limite:
Adulto
/
Humanos
Idioma:
Inglês
Revista:
Biol. Res
Assunto da revista:
Biologia
Ano de publicação:
2014
Tipo de documento:
Artigo
País de afiliação:
Chile
Instituição/País de afiliação:
Fundación Oftalmológica Los Andes Ophthalmology Clinic/CL
/
University of Chile/CL
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