440 likes | 1.06k Views
Clinical Presentation of Vitreoretinal Disorders. Dr. Ayesha Abdullah 28.10.2016. Learning outcomes. By the end of this lecture the students would be able to;
E N D
Clinical Presentation of Vitreoretinal Disorders Dr. Ayesha Abdullah 28.10.2016
Learning outcomes By the end of this lecture the students would be able to; • Identify the common symptoms and signs of VR disorders (VRD) and correlate them with the underlying problems with the structure and function of the VR. • Identify structural landmarks on retinal photographs. • Correlate the indications for commonly used investigations for the assessment of retinal disorders with the underlying pathology.
Common Presenting Symptoms in VRD • Visual loss, mostly painless, sudden/ gradual • Loss of central vision • Loss of peripheral vision • Loss of visual field • Loss of colour vision • Distorted vision; metamorphopsia, micropsia, macropsia
Common Presenting Symptoms in VRD • Loss of contrast sensitivity • Glare sensitivity • Night blindness • Photopsia/ flashes • Floaters ; 'specks', 'flies', 'spiders' and, ‘cobweb‘, ‘mosquitoes’.
Loss of central vision http://www.retina-international.org/
Loss of peripheral vision http://www.retina-international.org/
Colour vision deficiency http://www.achromatopsia.info/childrens-vision/
Scotoma Negative Scotoma Positive Scotoma
? RAPD
Commonly used investigations B Scan A Scan
What is the blood supply of the inner and outer retinal layers? • What makes the inner and outer retinal blood barriers and what is their significance? • Why light has to travel through all the layers before generating the sensation of vision?