Digital Photography as a Novel Technique of Measuring Ocular Surface Dimensions

Koushan, Keyvan; Skibell, Bentley C.; Harvey, Jack; Jankowski, Hanna; DeAngelis, Dan; Oestreicher, James H.

doi:10.1080/01676830802222811

Cited by 17 publications

(17 citation statements)

References 8 publications

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“…Eye and skin areas within the goggle were determined via a pixel-counting method adapted from Koushan et al 81 A digital camera (Sony Cyber-Shot DSCH50, Tokyo, Japan) was used to capture three pictures of each subject (or the mannequin eye) in the primary (perpendicular) gaze position. While in a sitting position, the subject was asked to look straight ahead in a relaxed manner during photographing.…”

Section: Experimental Protocolmentioning

confidence: 99%

Flow Evaporimeter To Assess Evaporative Resistance of Human Tear-Film Lipid Layer

Peng

Cerretani

et al. 2014

Ind. Eng. Chem. Res.

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A novel in vivo flow evaporimeter is developed to measure human tear-evaporation rates. The flow evaporimeter relies on a well-defined flow field to the eye with known and adjustable flow rates and relative humidities, and quantitatively reproduces evaporation rates for pure water. Mass-transfer analysis of the evaporimeter data elucidates, for the first time, the resistance of the human tear-film lipid layer (TFLL) toward minimizing tear loss to the environment. A pilot study on human subjects validates the feasibility of the flow evaporimeter to obtain the tear-film evaporation rates in vivo. Resistance of the TFLL against tear evaporation is found subject specific. Our flow evaporimeter offers an accurate, safe, and convenient diagnostic tool for clinical evaluation of dry-eye-related maladies.

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Section: Experimental Protocolmentioning

confidence: 99%

Flow Evaporimeter To Assess Evaporative Resistance of Human Tear-Film Lipid Layer

Peng

Cerretani

et al. 2014

Ind. Eng. Chem. Res.

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“…Again, for the same reason, indirect measurements, such as the ratio of pupil height to the distance between the 2 canthuses (which has a constant value for each patient), were used in addition to direct measurements, such as the distance between the pupil and the upper eyelid or the orbital fissure distance. 12 The exposed OSA, which is another measurement method described by Koushan et al, 13 seems to be effective for the calculation of the conjunctival area, which is indirectly affected by ptosis. All of the distinctive measurement methods used in this study indicated that the brow elevation, obtained with the aid of botulinum A toxin in patients who had undergone frontal slinging, was achieved without the development of lagophthalmos in the upper lid.…”

Section: Discussionmentioning

confidence: 99%

Effect of Brow Lifting Using Botulinum A Toxin on Upper Eyelid Height in Patients With Ptosis Undergoing the Frontal Sling Technique

Isik

Tekin²,

Karadağ³

et al. 2013

Annals of Plastic Surgery

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In this study, brow lifting with botulinum A toxin was performed on patients whose ptosis was corrected using the frontal sling technique, and the effects of this application on ptosis were investigated. Seven patients (with 12 eyelids) on whom the frontal sling procedure was performed using a tensor fascia lata graft were enrolled in the study. The patients underwent brow lifting using botulinum A toxin. Digital photographs of the patients were obtained before and 21 days after botulinum A injection. In digital imaging analysis, although a statistically significant elevation was detected in the eyelids and brows of the patients following botulinum A injection, it did not to lead to a significant difference in the degree of lagophthalmos. In the current study, this procedure was found to reduce the degree of ptosis without increasing the degree of lagophthalmos in patients who had previously undergone ptosis correction using the frontal sling.

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“…The diagram is rapidly obtained and precisely outlines the lower palpebral border through the use of the pen tool in the software program, which we believe is superior to other selection tools previously used to obtain measurements in the ocular region. 10 In obtaining measurements from digital images, earlier investigators used a ruler taped to the patients' heads as a reference and calibration tool. 10 This method is cumbersome and may be difficult to implement routinely during office consultations.…”

Section: Discussionmentioning

confidence: 99%

Incidence of Lower Eyelid Asymmetry

Bravo

Kufeke

Pascual

2013

Aesthetic Surgery Journal

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This software is a powerful and precise tool to evaluate and measure eyelid asymmetries. The use of this method showed a large degree of eyelid asymmetry preoperatively (more than 90%), which proves the importance of detecting and adequately analyzing this condition prior to surgery. The authors' simple method may be an important adjunct to obtaining optimal results in patients who seek eyelid surgery.

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Digital Photography as a Novel Technique of Measuring Ocular Surface Dimensions

Abstract: Digital ocular photography combined with computerized image analysis is a fast, easy to use, and reliable method of measuring ocular surface dimensions. In addition to ptosis surgery, this method can be used in other ocular surface studies.

Cited by 17 publications

References 8 publications

Flow Evaporimeter To Assess Evaporative Resistance of Human Tear-Film Lipid Layer

Flow Evaporimeter To Assess Evaporative Resistance of Human Tear-Film Lipid Layer

Effect of Brow Lifting Using Botulinum A Toxin on Upper Eyelid Height in Patients With Ptosis Undergoing the Frontal Sling Technique

Incidence of Lower Eyelid Asymmetry

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