Subjective and objective interpretation of tear film interferometry images
نویسندگان
چکیده
منابع مشابه
Tear film interferometry and corneal surface roughness.
PURPOSE Previous studies of optical interference from the whole thickness of the precorneal tear film showed much lower contrast than from the pre-contact lens tear film. It is hypothesized that the recorded low contrast is related to roughness of the corneal surface compared with the smooth contact lens surface. This hypothesis is tested, and characteristics of this roughness are studied. ME...
متن کاملThe tear film characteristics of spontaneous subconjunctival hemorrhage patients detected by Schirmer test I and tear interferometry
PURPOSE To evaluate the tear film characteristics of spontaneous subconjunctival hemorrhage patients by Schirmer test I and tear interferometry. METHODS Forty-six spontaneous subconjunctival hemorrhage patients and 46 controls were enrolled in the study. Schirmer test I and tear interferometry were performed in all 92 subjects. The results obtained were compared between the two groups. RESU...
متن کاملSubjective and Objective Quality Evaluation of Lightly Distorted Synthetic Images
Measuring visual quality, as perceived by human observers, is becoming increasingly important in a large number of applications in which humans are the ultimate consumers of visual information. To aid in the developing of objective image quality assessment (IQA) algorithms, many natural image databases have been developed that contain the subjective ratings of the images by human observers. Sub...
متن کاملStudy of precorneal tear film thickness and structure by interferometry and confocal microscopy.
Past measurements of precorneal tear film thickness in rabbits and humans gave values of 4-7 microns. These have been the accepted values. However, measurements presented in this report are much higher. Earlier techniques may have changed film thickness or not have fully included the layer containing mucus. Little is known about the mucus component. Thickness was measured in freshly killed anim...
متن کاملStudy of human precorneal tear film thickness and structure using laser interferometry.
The authors previously found that measurements of precorneal tear film thickness in animals, using laser interferometry and confocal microscopy, were larger than earlier estimates. They proposed that this occurred because optical methods did not disturb film structure and measured full thickness, including mucus. In the present study, tear film thickness was measured in humans. Coherent light w...
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ژورنال
عنوان ژورنال: International Journal of Research in Medical Sciences
سال: 2018
ISSN: 2320-6012,2320-6071
DOI: 10.18203/2320-6012.ijrms20183628