{"id":77,"url":"https://cclm.media-doc.io/conditions/77/","name":"E. Conical beam","category":"Biomicroscope","detail":"<h2>Overview</h2>\n\n<ul>\n\t<li>A conical beam is useful for assessing the anterior chamber and anterior vitreous</li>\n\t<li>It is used to look for the presence of either cells (flare) or pigment in the aqueous or vitreous</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<h2>Set Up</h2>\n\n<ul>\n\t<li>Room lights should be turned off and time given for the practitioner to dark adapt</li>\n\t<li>The light beam is adjusted to a narrow width</li>\n\t<li>The height of the beam is reduced until it forms a small circular shape</li>\n\t<li>High magnification is used</li>\n\t<li>The biomicroscope is focussed on the anterior chamber or anterior vitreous</li>\n\t<li>Detection of cells&nbsp;or pigment is enhanced by asking the patient to move their eyes and then watching for any movement&nbsp; as they look straight ahead again&nbsp;</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<h2>Useful when assessing</h2>\n\n<ul>\n\t<li>Looking for signs of active inflammation - flare (Tyndall effect)</li>\n\t<li>Looking for signs of retinal detatchment - pigment (Schaeffer&#39;s sign)</li>\n</ul>\n\n<p>&nbsp;</p>","images":[{"name":"Conical beam","file":"https://cclm-static.s3.amazonaws.com/images/CORE_Conical.png"}],"type":1,"videos":[{"name":"Conical Beam","videoSrc":"267427065"}],"wear":false,"ceaseWear":false,"changeLens":false,"changeSolutions":false,"changeCare":false,"counseling":false,"dd":false,"dw":false,"gp":false,"replace":false,"review":false,"rewettingDrops":false,"rx":false,"SiHy":false,"toric":false,"tags":[{"id":7,"url":"https://cclm.media-doc.io/tags/7/","name":"conditions"}]}