02/02/2017. Some observations. Past to present. David Henson

Transcription

1 Some observations Past to present David Henson

2 DEC PDP Park Place Henson DB, North RV (1980) Adaptation to prism induced heterophoria. Amer J Optom Physiol Optics, 56, Rachel North 2

3 Henson DB, North RV (1980) Adaptation to prism induced heterophoria. Amer J Optom Physiol Optics, 56, North RV, Henson DB (1981) Adaptation to prism induced heterophoria in subjects with abnormal vision or asthenopia. Amer J Optom Physiol Optics, 58, Henson DB, Dharamshi B (1982) Oculomotor adaptation to induced heterophoria and anisometropia. Invest Ophthalmol, North RV, Henson DB (1982) Effect of orthoptics upon the ability of patients to adapt to prism induced heterophoria. Amer J Optom Physiol Optics, 59, Henson DB, North RV, Dharamshi B (1983) Prism adaptation. Optician 184 No 4776, Sethi B, Henson DB (1984) Adaptive changes with prolonged effect of comitant and incomitant vergence disparities. Amer J Optom Physiol Optics, 61, Sethi B, Henson DB (1985) Vergence adaptive changes with a prism induced non-comitant disparity. Amer J Optom Physiol Optics, 62, North RV, Henson DB (1985) Adaptation to lens induced heterophorias. Amer J Optom Physiol Optics, 62, North RV, Sethi B, Henson DB (1987) Effects of prolonged forced vergence upon the adaptation system. Ophthal Physiol Optics, 7, North RV, Henson DB (1992) The effect of orthoptic treatment upon the vergence adaptation mechanism. Optometry Vision Sciences, 69, North, RV, Henson DB, Smith TJ (1993) Influence of proximal, accommodative and disparity stimuli upon the vergence system. Ophthal Physiol Optics, 13, Informational value Frequency of misses in eyes with glaucoma Frequency of misses in normals Henson DB, Chauhan BC (1985) Informational content of visual field location in glaucoma. Doc Ophthalmol, 59,

4 Henson DB, Chauhan BC, Hobley AJ (1988) Screening for glaucomatous VF defects: the relationship between sen, spec and the number of test locations. Ophthal Physiol Opt, 8, Wang Y, Henson DB. Diagnostic Performance Using Subsets of the 24-2 Test Pattern. Invest. Ophthalmol. Vis. Sci. 2013; Yanfang Wang 4

5 Henson CFS Andy Yorke Tony Ellison Henson Andy Yorke Threshold Henson DB, Chaudry S, Artes PH, Faragher EB, Ansons A. (2000) Response variability in the visual field: comparison of optic neuritis, glaucoma, ocular hypertension and normal eyes. Invest Ophthal Vis Sci 2000;41: Faculty of Biology, Medicine and Health 5

6 Led to a complete re-think of the way we undertake visual field tests Provided the basis for simulation of VF defects. Good example is the extension of this work by Stuart Gardiner At damaged locations variability is high and add noise to the current quantification methods Gardiner et al. Accuracy of perimetry at low sensitivities in glaucoma. Ophthalmology 2014;121: Henson, DB, Spencer AF, Harper R, Cadman EJ. (2003) Community refinement of glaucoma referrals. Eye 2003;17:

7 Ratnarajan G, Newsom W,Vernon SA, Fenerty C, Henson D, Spencer F, Wang Y, Harper R, McNaught A, Collins L, Parker M, Lawrenson J, Hudson R, Khaw PT, Wormald R, Garway-Heath D, Bourne R. The effectiveness of schemes that refine referrals between primary and secondary care the UK experience with glaucoma referrals: the Health Innovation & Education Cluster (HIEC) Glaucoma Pathways Project. BMJ Open 2013;3:e doi: /bmjopen Faculty of Biology, Medicine and Health 7

8 Manchester glaucoma team Leaon Au Cecilia Fenerty Patrick Gunn Robert Harper Amanda Harding Joanne Marks Karl Mercieca Fiona Spencer Denniss J, Echendu D, Henson DB, Artes PH. Discus: Investigating Subjective Judgment of Optic Disc Damage. Optom Vis Sci 2011;88:E93-E101 Faculty of Biology, Medicine and Health 8

9 Aslam TM, Rahman W, Henson D, Khaw PT. A novel paediatric game-based visual-fields assessor. Brit J Ophthalmol 2011;95: Miranda MA, Henson DB, Fenerty C, Biswas S, Aslam T. Development of a paediatric visual field test. TVST (in press). Wang Y, Ali Z, Subramani S, Biswas S, Fenerty C, Henson DB, Aslam T. Use of novel game-based algorithms to measure threshold size of visual field stimuli in normal children. Ophthalmology & Therapy (in press). Faculty of Biology, Medicine and Health Rate of change Emmanouil Tsamis (Manos) 9

10 % new cases 02/02/2017 Reducing visual impairment Sudden loss of visual field rare event solution is more frequent testing difficult to justify Early case detection need to reach healthcare avoiders promotions encourage the worried well to come earlier Solution is increased accessibility to simple, rapid, enjoyable tests Percentage of undetected cases West of Ireland Year Baltimore Eye Study (Blacks) Baltimore Eye Study (Whites) Barbados Eye Study Beaver Dam Study Rotterdam Study Blue Mountains Study Victoria, Aust Melbourne VI Project North London Study Egna Neumarkt Study Arizona Hispanic study Los Angeles Latino Eye Study Thessaloniki Eye Study 10

11 Japanese Clock chart 2012 Chota Matsumoto 62,455,367 copies of CLOCK CHART were released in newspapers 350,783 (5%) subsequently consulted a doctor 31,076 of them were diagnosed with glaucoma. 9,342 received medical treatment Self test Existing patients encouraged to regularly test their own VF Bring there results along to clinic appointments Allows more frequent testing and, potentially, more accurate measurement of rates Develop down loadable self test Create an app 11

12 Self testing VuScope Visual Field Screener Damato Multifixation Campimeter - Online Version ipad perimeter Algis Vingrys group 2016 Manchester approach Program to run on Windows platform Better usability, series of usability trials Distributed to patients to test relatives/friends 12

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14 A big thank you Robert Harper Cecilia Fenerty Career Mentors Neville Drasdo Michel Millodot David McLeod 14

15 A big thank you 15