scholarly journals Location and pattern of non‐invasive keratographic tear film break‐up according to dry eye disease subtypes

2019 ◽  
Vol 97 (8) ◽  
Author(s):  
Jieun Kim ◽  
Jung Yong Kim ◽  
Kyoung Yul Seo ◽  
Tae‐im Kim ◽  
Hee Seung Chin ◽  
...  
Keyword(s):  
Dry Eye ◽  
Tear Film ◽  
Dry Eye Disease ◽  
Eye Disease ◽  
Non Invasive ◽  
Disease Subtypes ◽  
Break Up

scholarly journals An investigation of non-invasive tear break up time and tear meniscus height of keratoconic versus non-keratoconic individuals

2016 ◽  
Vol 75 (1) ◽  
Author(s):  
Deanne L. Nicholas ◽  
Wayne D.H. Gillan
Keyword(s):  
Dry Eye ◽  
Tear Film ◽  
Dry Eye Disease ◽  
Eye Disease ◽  
Non Invasive ◽  
Control Subjects ◽  
Tear Meniscus ◽  
Break Up ◽  
Tear Meniscus Height ◽  
And Control

Keratoconus is a debilitating condition where the cornea develops a conical shape rather than the characteristic round shape due to various physiological and structural changes taking place within the layers of the cornea. As a result of the pathogenesis of keratoconus, there are numerous changes that may occur within the tears of these patients. Research has shown changes in the tear metabolome, the presence of degradation products as well as loss of goblet cells into the tears. Could the changes occurring within the tear structure of these patients affect the results of various tear quantity and quality tests? Non-invasive tear break up time (NTBUT) is a diagnostic test used to determine the quality of the tear film and has been used extensively when diagnosing dry eye disease. This test is utilised in order to determine the time taken for the tear film to begin breaking apart, signalling thinning of the tears. Shorter break up times are therefore indicative of instability or changes occurring within the tear film which could be diagnostic of dry eye disease. Tear meniscus height (TMH) measurements have also been utilised in clinical practice, where these measurements provide an indication of the volume of tears contained within the upper and lower menisci. Lower tear volumes have been shown to be present in cases of dry eye disease where either tear production or tear drainage may be affected. Changes in the quality and quantity of the tear film in subjects with dry eye disease have been thoroughly investigated; however, the same cannot be said for subjects with keratoconus. Could the same findings be possible in subjects with keratoconus? Is it possible that the changes occurring within the tears of keratoconic subjects could lead to abnormal NTBUT and TMH measurements when compared to those of control subjects? Could the results of the NTBUT and TMH tests be related to one another? This study compares the NTBUT and TMH measurements of both keratoconic and control subjects by making use of a single type of instrumentation, namely the Oculus Keratograph 4 (OK4). The results of this study reveal that the values obtained for each of the two subject groups are not shown to be statistically significantly different and that there is no significant correlation between the NTBUT and TMH measurements when comparing keratoconic and control subjects.

scholarly journals The Association between Tear Film Thickness as Measured with OCT and Symptoms and Signs of Dry Eye Disease: A Pooled Analysis of 6 Clinical Trials

2020 ◽  
Vol 9 (11) ◽  
pp. 3791
Author(s):  
Gerhard Garhöfer ◽  
Valentin Aranha Dos Santos ◽  
Hannes Stegmann ◽  
Doreen Schmidl ◽  
Narine Adzhemian ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Film Thickness ◽  
Dry Eye ◽  
Tear Film ◽  
Pooled Analysis ◽  
Dry Eye Disease ◽  
Eye Disease ◽  
Break Up ◽  
Symptoms And Signs ◽  
Schirmer I Test

Purpose: To determine the association between tear film thickness (TFT) as measured with ultra-high resolution optical coherence tomography (UHR-OCT) and signs and symptoms of dry eye disease (DED). Methods: A total of 450 eyes from 225 patients with DED from six different randomized clinical trials were included in this pooled analysis. In all subjects, TFT was measured with a custom-built UHR-OCT system. Symptoms of DED were quantified using a standardized Ocular Surface Disease Index (OSD)I questionnaire and clinical signs including tear film break up time (TFBUT) and Schirmer I test were assessed. Associations of the average TFT with OSDI, TFBUT, and Schirmer I test were calculated using a linear regression analysis. Results: The average TFT of the included sample (mean age, 45.0 ± 13.3 years; 65% female) was 4.2 ± 0.5 µm and the OSDI 36.2 ± 10.4. A significant negative correlation was found between TFT and OSDI (r = −0.36 to −0.31; p < 0.001). Tear break up time and Schirmer I test were not correlated with OSDI. Significant albeit weak correlations were found between TFT and TFBUT (r = 0.17 to 0.25; p < 0.01) as well as Schirmer I (r = 0.36 to 0.37; p < 0.001). Subgroup analysis revealed that the correlation was stronger in the subjects with abnormal Schirmer I (<15 mm; r = 0.50 to 0.54; p < 0.001). Conclusions: The present study demonstrates an objective measurement of TFT using a novel OCT approach for DED that correlates with symptoms and signs of DED. Our data are consistent with the idea that TFT represents the aqueous-deficient component of DED.

Simplified Classification of Tear Film Break-Up Patterns and Their Clinicopathological Correlations in Patients With Dry Eye Disease

2020 ◽  
Vol 47 (1) ◽  
pp. 15-19
Author(s):  
Hee Dong Eom ◽  
Jae Uk Jung ◽  
Kyoung-Pil Lee ◽  
Jeongho Kim ◽  
Dong Hee Yoon ◽  
...  
Keyword(s):  
Dry Eye ◽  
Tear Film ◽  
Dry Eye Disease ◽  
Eye Disease ◽  
Clinicopathological Correlations ◽  
Break Up

scholarly journals Advances in the Noninvasive Diagnosis of Dry Eye Disease

2021 ◽  
Vol 11 (21) ◽  
pp. 10384
Author(s):  
Luca Di Cello ◽  
Marco Pellegrini ◽  
Aldo Vagge ◽  
Massimiliano Borselli ◽  
Lorenzo Ferro Desideri ◽  
...  
Keyword(s):  
Dry Eye ◽  
Anterior Segment ◽  
Tear Film ◽  
Optical Quality ◽  
Dry Eye Disease ◽  
Diagnostic Tools ◽  
Eye Disease ◽  
Non Invasive ◽  
Integrated Devices

Dry eye disease (DED) is a multifactorial disease that represents one of the most common ophthalmologic conditions encountered in everyday clinical practice. Traditional diagnostic tests for DED, such as subjective questionnaires, tear film break-up time and the Schirmer test, are often associated with poor reproducibility and reliability, which make the diagnosis, follow-up, and management of the disease challenging. New advances in imaging technologies enable objective and reproducible measurements of DED parameters, thus making the diagnosis a multimodal imaging-based process. The aim of this review is to summarize all the current and emerging diagnostic tools available for the diagnosis and monitoring of DED, such as non-invasive tear breakup time, thermography, anterior segment optical coherence tomography, meibography, interferometry, in vivo confocal microscopy, and optical quality assessment. Although there is not a gold standard imaging technique, new multi-imaging-integrated devices are precious instruments to help clinicians to better cope with the diagnostic complexity of DED.

scholarly journals Objective Imaging Diagnostics for Dry Eye Disease

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Sang Beom Han ◽  
Yu-Chi Liu ◽  
Karim Mohamed-Noriega ◽  
Louis Tong ◽  
Jodhbir S. Mehta
Keyword(s):  
Dry Eye ◽  
Clinical Symptoms ◽  
Imaging Techniques ◽  
Anterior Segment ◽  
Tear Film ◽  
Optical Quality ◽  
Dry Eye Disease ◽  
Eye Disease ◽  
Break Up

Traditional diagnostic tests for dry eye disease (DED), such as fluorescein tear film break-up time and the Schirmer test, are often associated with poor reproducibility and reliability, which make the diagnosis, follow-up, and management of the disease challenging. Advances in ocular imaging technology enables objective and reproducible measurement of changes in the ocular surface, tear film, and optical quality associated with DED. In this review, the authors will discuss the application of various imaging techniques, such as, noninvasive tear break-up time, anterior segment optical coherence tomography, in vivo confocal microscopy, meibography, interferometry, aberrometry, thermometry, and tear film imager in DED. Many studies have shown these devices to correlate with clinical symptoms and signs of DED, suggesting the potential of these imaging modalities as alternative tests for diagnosis and monitoring of the condition.

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