TFOS DEWS II pain and sensation report
Carlos Belmonte,Jason J. Nichols,Stephanie Cox,James A. Brock,Carolyn G. Begley,David A. Bereiter,Darlene A. Dartt,Anat Galor,Anat Galor,Pedram Hamrah,Jason J. Ivanusic,Deborah S. Jacobs,Nancy A. McNamara,Nancy A. McNamara,Mark I. Rosenblatt,Fiona Stapleton,James S. Wolffsohn +16 more
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TLDR
Pain associated with mechanical, chemical, and thermal heat stimulation of the ocular surface is mediated by trigeminal ganglion neurons, while cold thermoreceptors detect wetness and reflexly maintain basal tear production and blinking rate, thereby evoking dryness sensations and pain.Abstract:
Pain associated to mechanical and chemical irritation of the eye surface is mediated by trigeminal ganglion mechano- and polymodal nociceptor neurons while cold thermoreceptors detect wetness and reflexly maintain basal tear production and blinking rate. These neurons project into two regions of the trigeminal brain stem nuclear complex: ViVc, activated by changes in the moisture of the ocular surface and VcC1, mediating sensory-discriminative aspects of ocular pain and reflex blinking. ViVc ocular neurons project to brain regions that control lacrimation and spontaneous blinking and to the sensory thalamus. Secretion of the main lacrimal gland is regulated dominantly by autonomic parasympathetic nerves, reflexly activated by eye surface sensory nerves. These also evoke goblet cell secretion through unidentified efferent fibers. Neural pathways involved in the regulation of Meibonian gland secretion or mucins release have not been identified.In dry eye disease, reduced tear secretion leads to inflammation and peripheral nerve damage. Inflammation causes sensitization of polymodal and mechano-nociceptor nerve endings and an abnormal increase in cold thermoreceptor activity, altogether evoking dryness sensations and pain. Long-term inflammation and nerve injury alter gene expression of ion channels and receptors at terminals and cell bodies of trigeminal ganglion and brainstem neurons, changing their excitability, connectivity and impulse firing. Perpetuation of molecular, structural and functional disturbances in ocular sensory pathways ultimately leads to dysestesias and neuropathic pain referred to the eye surface. Pain can be assessed with a variety of questionaires while the status of corneal nerves is evaluated with esthesiometry and with in vivo confocal microscopy.read more
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TFOS DEWS II Definition and Classification Report
Jennifer P. Craig,Kelly K. Nichols,Esen K. Akpek,Barbara Caffery,Harminder S Dua,Choun Ki Joo,Zuguo Liu,J. Daniel Nelson,J. Daniel Nelson,Jason J. Nichols,Kazuo Tsubota,Fiona Stapleton +11 more
TL;DR: The new definition recognizes the multifactorial nature of dry eye as a disease where loss of homeostasis of the tear film is the central pathophysiological concept and central to the scheme is a positive diagnosis of DED with signs and symptoms, and this is directed towards management to restore homeostosis.
Journal ArticleDOI
TFOS DEWS II Diagnostic Methodology report
James S. Wolffsohn,Reiko Arita,Robin L. Chalmers,Ali R. Djalilian,Murat Dogru,Kathy Dumbleton,Preeya K. Gupta,Paul M. Karpecki,Sihem Lazreg,Heiko Pult,Benjamin Sullivan,Alan Tomlinson,Louis Tong,Edoardo Villani,Kyung Chul Yoon,Lyndon Jones,Jennifer P. Craig +16 more
TL;DR: The role of the Tear Film and Ocular Surface Society (TFOS) Dry Eye Workshop (DEWS) II Diagnostic Methodology Subcommittee was to identify tests used to diagnose and monitor dry eye disease (DED) to identify those most appropriate to fulfil the definition of DED and its sub-classifications.
Journal ArticleDOI
TFOS DEWS II pathophysiology report
Anthony J. Bron,Anthony J. Bron,Cintia S. de Paiva,Sunil K. Chauhan,Stefano Bonini,Eric E. Gabison,Sandeep Jain,Erich Knop,Maria Markoulli,Yoko Ogawa,Victor L. Perez,Yuichi Uchino,Norihiko Yokoi,Driss Zoukhri,David A. Sullivan +14 more
TL;DR: The TFOS DEWS II Pathophysiology Subcommittee reviewed the mechanisms involved in the initiation and perpetuation of dry eye disease, finding the targeting of the terminal duct in meibomian gland disease and the influence of gaze dynamics and the closed eye state on tear stability and ocular surface inflammation to be important.
Journal ArticleDOI
TFOS DEWS II Management and Therapy Report
Lyndon Jones,Laura E Downie,Donald R. Korb,Jose M. Benitez-del-Castillo,Reza Dana,Sophie X. Deng,Pham N. Dong,Gerd Geerling,Richard Y Hida,Yang Liu,Kyoung Yul Seo,Joseph Tauber,Tais Hitomi Wakamatsu,Jianjiang Xu,James S. Wolffsohn,Jennifer P. Craig +15 more
TL;DR: It became clear that many of the treatments available for the management of dry eye disease lack the necessary Level 1 evidence to support their recommendation, often due to a lack of appropriate masking, randomization or controls and in some cases due to issues with selection bias or inadequate sample size.
Journal ArticleDOI
TFOS DEWS II Tear Film Report
Mark D. P. Willcox,Pablo Argüeso,Georgi As. Georgiev,Juha M. Holopainen,Gordon W. Laurie,Tom J. Millar,Eric B. Papas,Jannick P. Rolland,Tannin A. Schmidt,Ulrike Stahl,Tatiana Suarez,Lakshman N. Subbaraman,Ömür Ö. Uçakhan,Lyndon Jones +13 more
TL;DR: The members of the Tear Film Subcommittee reviewed the role of the tear film in dry eye disease (DED), biophysical and biochemical aspects of tears and how these change in DED and recommended areas for future research.
References
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