Results 211 to 220 of about 4,315,419 (235)

Diurnal Variation in Precorneal Tear Film Stability

American journal of optometry and physiological optic, 1988
ABSTRACT The stability of the precorneal tear film as inferred from the tear thinning time (TTT) appears to vary over a single 12‐h period. The form of this variation is subject dependent. For the average patient the stability is low early in the morning, and tends to rise to equilibrium level between 10:00 a.m. and 12 noon.
S, Patel, R, Bevan, J C, Farrell
openaire   +2 more sources

Evaluation of the tear film stability after laser in situ keratomileusis using the tear film stability analysis system

American Journal of Ophthalmology, 2004
To evaluate the tear film stability of patients before and after laser in situ keratomileusis (LASIK) using the tear film stability analysis system (TSAS).Prospective observational case series.New videokeratography software for a topographic modeling system (TMS-2N) was developed that can automatically capture consecutive corneal surface images every ...
Tomoko, Goto, Xiaodong, Zheng, Stephen D, Klyce, Hisashi, Kataoka, Toshihiko, Uno, Masahiko, Yamaguchi, Mike, Karon, Sumie, Hirano, Shigeki, Okamoto, Yuichi, Ohashi   +9 more
openaire   +2 more sources

Age‐Related Changes in Precorneal Tear Film Stability

Optometry and Vision Science, 1989
ABSTRACT For several years it has been known that the production rate of tears declines as age increases. Reports suggest that this reduction is more apparent in females than in males. Using a noninvasive method we report that a significant linear reduction in precorneal tear film stability occurs between the ages of 8 and 80 years ...
S, Patel, J C, Farrell
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[Effection of tear film stability on orthokeratology].

[Zhonghua yan ke za zhi] Chinese journal of ophthalmology, 2023
Orthokeratology (Ortho-K) is one of the effective methods to control the development of myopia in children and adolescents. The mechanical pressure of eyelids on the Ortho-K lens and the hydraulic effect of tears under the Ortho-K lens can alter the curvature or shape of the cornea, which can correct refractive error and control myopia development ...
X, Guo, P Y, Xie
openaire   +1 more source

Tear film flow and stability in acute and chronic conjunctivitis

Acta Ophthalmologica, 1987
Abstract. Tear film flow and stability studies were carried out in patients suffering from acute and chronic conjunctivitis by performing Schirmer test‐I and breakup‐time (BUT) measurements. In this clinical study, patients with chronic conjunctival inflammation demonstrated a premature break‐up of tear film despite normal amounts of aqueous tears. In
A K, Khurana, S S, Moudgil, I P, Parmar, B K, Ahluwalia   +3 more
openaire   +2 more sources

Study of tear film flow and stability in chronic dacryocystitis

Acta Ophthalmologica, 1987
Abstract. Tear film flow and stability studies were carried out in patients suffering from chronic dacryocystitis by performing Schirmer test‐I and tear film break‐up‐time (BUT) measurements. The results of Schirmer's test corroborated the theory that a reduced out flow of tears causes a compensatory reduced tear secretion.
A K, Khurana, S S, Moudgil, B K, Ahluwalia, I P, Parmar   +3 more
openaire   +2 more sources

Tear Film Stability Analysis System

Cornea, 2004
To review our previous studies regarding the development of a tear stability analysis system (TSAS) using videokeratography and the clinical application of TSAS for evaluation of tear film stability in patients subject to laser in situ keratomileusis (LASIK).New software, namely TSAS, was developed for the videokeratography system TMS-2N (topographic ...
Tomoko, Goto, Xiaodong, Zheng, Shigeki, Okamoto, Yuichi, Ohashi   +3 more
openaire   +2 more sources

Effect of Hydrogel Lens Wear on Tear Film Stability

Optometry and Vision Science, 1991
Noninvasive break-up time (NIBUT) of the tears was measured in a controlled, randomized, double-masked study to assess: (1) the stability of the prelens tear film during wear of new high and low water content lenses and (2) the stability of the precorneal tear film following lens removal after 1 h of wear.
E, Faber, T R, Golding, R, Lowe, N A, Brennan   +3 more
openaire   +2 more sources

Immediate impact of hyaluronic and methylcellulose artificial tears on tear film stability

Acta Ophthalmologica, 2014
AbstractPurpose To evaluate immediate impact of hyaluronic and methylcellulose artificial tears on tear film stability.Methods We performed keratography with tear film analyze in 21 volunteers using Keratograph 4 (Oculus, Germany). After base measurement, volunteers received topical artificial tears drops containing 0.15% Sodium Hyaluronate into right ...
E WYLEGALA, A SMEDOWSKI, D TARNAWSKA, T CIESLIK, B WEGLARZ, A NOWINSKA, D DOBROWOLSKI   +6 more
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Soft Lens Lubricants and Prelens Tear Film Stability

Optometry and Vision Science, 1990
Soft contact lens wearers complaining of “dry eye” are frequently prescribed rewetting drops, although the mode of action and efficacy of this treatment have not been established. Enhancement of prelens tear film (PLTF) stability could provide a basis for symptomatic relief with solution instillation. Thirty symptomatic hydroxyethyl methacrylate (HEMA)
Golding, Timothy R., Efron, Nathan, Brennan, Noel A.   +2 more
openaire   +2 more sources