Results 241 to 250 of about 21,770,823 (273)

Automation of the tear film break-up time test

Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies, 2011
The Break-Up Time test (BUT) evaluates the quality and stability of the tear film. It is used for the diagnosis of the dry eye syndrome, a widespread disease in the developed world. This paper describes an automatic methodology to evaluate the BUT test. This methodology locates the different measurement areas from a video of the tear film, extracts the
Elsa Cebreiro, Lucía Ramos, Antonio Mosquera González, Noelia Barreira, Manuel Francisco González Penedo   +4 more
openaire   +1 more source

Reliability of the Tear Break‐Up Time Technique of Assessing Tear Stability and the Locations of the Tear Break‐Up in Hong Kong Chinese

Optometry and Vision Science, 1992
ABSTRACT The measurement of tear break‐up time (TBUT) in assessing stability of the tear film is somewhat controversial, even though the technique is widely used. We examined reliability of the technique within and among examiners and conclude that measurements of TBUT can be made reliably; full‐beam observation of the cornea is ...
P, Cho, B, Brown, I, Chan, R, Conway, M, Yap   +4 more
openaire   +2 more sources

Tear break‐up time: clinical procedures and their effects

Ophthalmic and Physiological Optics, 1998
Summary Three successive (representative) values of fluorescein‐instillation TBUT (tear break‐up time) were obtained from a group of young Hong Kong (HK)‐Chinese. The median TBUT1, TBUT2 and TBUT3 were 3.2, 3.8 and 4.5 sec, respectively. Wilcoxon signed‐rank tests showed that TBUT1 was significantly different from TBUT2 and TBUT3, but
P, Cho, L, Leung, A, Lam, A, Choi
openaire   +2 more sources

Evaluation of Tear Film Interference Patterns and Measures of Tear Break-Up Time

Optometry and Vision Science, 2002
ABSTRACT: Purpose. The purpose of this study was to compare the agreement within and between examiners when evaluating real‐time and digital photographs of TearScope Plus tear film interference patterns.
Jason J, Nichols, Kelly K, Nichols, Brian, Puent, Mario, Saracino, G Lynn, Mitchell   +4 more
openaire   +2 more sources

The Relation between Invasive and Noninvasive Tear Break-Up Time

Optometry and Vision Science, 1995
ABSTRACT TBUT and NITBUT (tear break‐up time and noninvasive tear break‐up time, respectively) were measured on four groups of subjects from different countries (two groups of Caucasians, two groups of Chinese). No significant difference was found in either TBUT or NITBUT values among the four groups of subjects.
P, Cho, W, Douthwaite
openaire   +2 more sources

Schirmer tear test values and tear film break‐up times in cats with conjunctivitis

Veterinary Ophthalmology, 2005
AbstractObjectives (1) To document tear film break‐up time (TFBUT) in a group of cats with conjunctivitis; (2) to determine if TFBUTs from cats with conjunctivitis vary significantly from previously established normal values for TFBUT in young cats without ocular disease; (3) to determine if a correlation exists between Schirmer tear test (STT) values ...
Christine C, Lim, Cheryl L, Cullen
openaire   +2 more sources

The non-invasive tear film break-up time in normal children

British Journal of Ophthalmology, 2013
To perform an objective evaluation of the non-invasive tear break-up time (NITBUT) and lipid layer interferometry in normal children.Children with no known ocular surface disease or anterior segment abnormality were evaluated. We excluded patients with disorders affecting lid margins or tear film composition.
Sophie M, Jones, Ken K, Nischal
openaire   +2 more sources

Schirmer Test and Break-Up Time of Tear Film in Normal Subjects

American Journal of Ophthalmology, 1979
We examined the precorneal film, the Schirmer test No. 1, and the break-up time tests in 440 healthy young students. There were no statistically significant differences (1) between men and women from the same origin who were brought up in the same environment, (2) between students from different ethnic origins who were brought up in the same ...
A, Shapiro, S, Merin
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OUTFLOW OF TEARS AND ITS INFLUENCE ON TEAR SECRETION AND BREAK UP TIME (B. U. T.)

Acta Ophthalmologica, 1977
Schirmer's test shows that a retarded outflow of tears causes reduction of the tear secretion.The B. U. T. is independent of the outflow of tears in patients with epiphora (119 eyes with mechanical obstruction, functional obstruction, or normal passage).Mucomimetics prolong the B. U. T. and retard the outflow of tears, whereas ointments reduce both the
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The effect of tear substitutes on tear film break-up time.

Investigative ophthalmology, 1975
Twelve commercial artificial tear solutions and a newly developed one were evaluated as to their effect on tear film breakup time (BUT) in ten normal subjects. Instillation of one drop of these solutions altered the BUT in such a way that serial BUT measurements could be used as an index of retention time.
M A, Lemp, M, Goldberg, M R, Roddy
openaire   +1 more source