Comparative study of two non-invasive tear film stability techniques

AbstractThe aim of the study was to analyze the correlation between the presence of Demodex mites in the hair follicles of patients' eyelashes and the stability and break up time of the tear film assessed with the Non-Invasive Tear Break Up Times (NIBUT) method. 319 patients were included in the study (195 women, 124 men). The patients were divided into two groups: those with Demodex infestation and without visible symptoms of eyelid or eye surface diseases, and asymptomatic non-infested patients. The NIBUT analysis was performed with a 5 M keratograph (oculus). Non-invasive tests were performed to identify the first and mean values of the tear break up time. The first and mean tear break up time in the Demodex-infested group was lower than in the non-infested subjects. The difference was a highly statistically significant. There was a significant correlation with the age of the patients for the first break up time. The first break up time in both eyes decreased with the age of the Demodex-infested and non-infested patients. The NIBUT analyses indicate the impact of Demodex mites on the tear film stability. This may suggest possible association of demodicosis with dry eye syndrome.

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Short Term Effect of Virtual Reality on Tear Film Stability and Ocular Discomfort

Journal of Engineering and Science Research ◽

10.26666/rmp.jesr.2020.1.7 ◽

2020 ◽

Vol 4 (1) ◽

pp. 40-46

Author(s):

Mohd Zulfaezal Che Azemin ◽

Keyword(s):

Virtual Reality ◽

Tear Film ◽

Film Stability ◽

The Public ◽

Non Invasive ◽

Significant Difference ◽

Ocular Discomfort ◽

Tear Film Stability ◽

Before And After ◽

Tear Meniscus Height

Virtual reality (VR) has been integrated and used with smartphones as one of the digital entertainments such as in gaming and movie streaming. With emergent of various VR brands in the market, it concerns the public on the possible side effects of VR on the ocular performance specifically on tear film stability and ocular discomfort. The purpose of this study was to compare the change on non-invasive keratograph tear break-up time (NIKBUT), tear meniscus height (TMH) before and after the use of VR for 30 minutes, and to measure the ocular discomfort after the use of VR quantitatively. Thirty-two subjects were recruited in this study and all the subjects were divided randomly into two groups; VR and laptop (used as a control) groups. Each subject needed to watch a movie for 30 minutes using the respective devices. The changes of tear film stability and ocular discomfort before and after the use of the devices were then compared and the results showed that there was no significant difference (p>0.05) after 30 minutes of the use. Comparison of the ocular parameters between the devices on post-watching activities was also not significant (p>0.05). Use of VR did not give any signs of dryness to the eyes and it can be used without any discomfort even after 30 minutes usage of the devices.

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Non-invasive assessment of tear film stability with a novel corneal topographer in Indian subjects

International Ophthalmology ◽

10.1007/s10792-016-0186-7 ◽

2016 ◽

Vol 36 (6) ◽

pp. 781-790 ◽

Cited By ~ 4

Author(s):

Vipul Bhandari ◽

Jagdeesh K. Reddy ◽

Kirti Relekar ◽

Ameya Ingawale ◽

Neeraj Shah

Keyword(s):

Tear Film ◽

Film Stability ◽

Non Invasive ◽

Tear Film Stability

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Tear film parameters before and after intracorneal ring segment implantation in keratoconic eyes

European Journal of Ophthalmology ◽

10.1177/1120672120958301 ◽

2020 ◽

pp. 112067212095830

Author(s):

Iraklis Vastardis ◽

Zisis Gatzioufas ◽

Cameron McLintock ◽

Markus Kohlhaas ◽

Samer Hamada ◽

...

Keyword(s):

Tear Film ◽

Schirmer Test ◽

Film Stability ◽

Non Invasive ◽

Tear Film Stability ◽

Before And After ◽

Ring Segment ◽

Time Test ◽

Intracorneal Ring Segment ◽

Breakup Time

Purpose: To assess signs of dry eye syndrome in keratoconic eyes following intracorneal ring segment (ICRS) implantation. Patient and methods: Twenty eyes of 20 consecutive patients with keratoconus were assessed for tear film changes following ICRS implantation at 6 months postoperatively. Evaluated parameters included tear osmolarity, non-invasive tear breakup time test (NI-BUT test) and Schirmer test I and II before and after treatment. Results: No significant changes were found with respect to osmolarity, Schirmer I and II ( p = 0.9, p < 0.64, and p < 0.91, respectively). The NITUBT was significantly lower after surgery ( p = 0.04). Conclusion: Our results suggest that implantation of ICRS does not result in a significant change in tear film osmolarity, or tear film volume nor improves the tear film stability.

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