SAT-513 Thyroid Disease And Infrared Imaging Of Eyelids

Background: Thyroid eye disease is thought to present as proptosis and/or severe conjunctival chemosis. Severe dry eye disease and its symptoms of non-specific eye pain and foreign body sensation in the eye can be overlooked as an early biomarker of thyroid disease. New infrared imaging can be used to evaluate dry eye and eyelid gland anatomy. Infrared imaging and detailed history of thyroid eye symptoms may lead to subsequent testing of thyroid function and more referrals to thyroid specialists. Purpose: Using infrared photography to evaluate dry eye complaints in patients: do they have thyroid disease? Methods: A retrospective chart review (2017–2019) of patients with dry eyes, eyelid imaging with infrared photography and thyroid lab testing was performed. Infrared photography with 820 nm wavelength (Heidelberg Spectralis, Heidelberg, Germany). Percentage loss of Meibomian glands was identified for each eye, then analyzed, per patient. The control population consisted of patients with no dry eye complaints, no thyroid testing or thyroid history. Exclusion criteria: patients over the age of 90 years and patients with a history of glaucoma, diabetes, cataract surgery, and eyelid surgery. Age matching was done (±5 years). Results: n=48 patients, avg age=57.73 years (sd=16.81, range 21–85 years). Thyroid patients: n=24 patients, male=10, female=14, avg age= 57.12 years (sd=16.65, med=55.5, range 23–83 years). Controls: n=24 patients, male=9, female=15, avg age=58.33 years (sd=17.30, med=58, range 21–85 years). Loss of Meibomian glands: thyroid=40.94%, control=5.10% (p<0.0001, t-test). Dry eye complaints: thyroid = 16/24, control = 0/24 (p<0.0001, x2). Discussion: Meibomian glands are glands in the upper and lower eyelids. These glands provide the lipid component of the tear film, thus slowing the evaporation of the tears and stabilizing the tear film with each blink. Meibomian gland loss would explain the dry eye symptoms in an abnormal thyroid patient population. Infrared photography can be performed with a #87 camera lens filter (cost = $65). The loss of Meibomian glands may be an early sign for thyroid disease. Conclusion: Infrared photography may be helpful in identifying severe dry eye, thus leading to increased awareness of thyroid eye disease symptoms in our patients in ophthalmology, endocrinology, and primary care.

STEREO VISION APPLYING OPENCV AND RASPBERRY PI

This article points out the single board computer Raspberry Pi and the related camera modules for image acquisition. Particular attention is directed to stereoscopic image recording and post processing software applying OpenCV. A design of a camera network is created and applied to a field application. The OpenCV computer vision library and its Python binding provides some script samples to encourage users developing their own custom tailored scripts. Stereoscopic recording is intended for extended base lines without a mechanical bar. Image series will be taken in order to wipe out moving objects from the frames. And finally the NoIR camera made infrared photography possible with low effort. Computer, accupack and lens board are assembled in a 3D printed housing operated by a mobile device.

A Painter in the Shadow: Unveiling Conservation, Materials and Techniques of the Unknown Luso-Flemish Master of Lourinhã

The painting collection of Santa Casa da Misericórdia da Lourinhã is amongst Portugal’s most notable and scarcely best-known cultural heritage. The artistic interest of this pictorial group, besides the advanced state of degradation of a number of the paintings, together with the ruined circumstances of the building accommodating the collection, today in reconstruction, were the key reasons for this study. Thermo-hygrometric measurements were carried out. A multianalytical methodology incorporating micro-X-ray diffraction (µ-XRD), energy-dispersive X-ray fluorescence spectroscopy (EDXRF), scanning electron microscopy–energy dispersive spectroscopy (SEM–EDS), micro-Raman spectroscopy (µ-Raman), micro-Fourier transform infrared spectroscopy (µ-FTIR) has been followed for the study. These analyses were complemented by infrared photography (IRP) and reflectography (IRR), allowing the study of the underdrawing technique. The results of this study were compared with previous ones of the painter’s workshop and important distinctions and similarities were found within the materials and techniques used. This analysis methodology on materials contributes to safeguarding and the ensuing community awareness of this cultural heritage in danger.