{"id":73,"url":"https://cclm.media-doc.io/conditions/73/","name":"G. Indirect Retro Illumination","category":"Biomicroscope","detail":"<h2>&nbsp;</h2>\n\n<h2>Overview</h2>\n\n<ul>\n\t<li>Retro-illumination uses reflected light from the iris or the fundus to view structures of the anterior eye</li>\n\t<li>The technique is useful to help visualize ocular structures and pathologies that show up best in shadow</li>\n\t<li>The illumination and observation system are uncoupled for this viewing technique</li>\n\t<li>Alternatively, the biomicroscope systems can remain coupled with the practitioner observing the area of interest to the side of the optic section</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<h2>Set Up</h2>\n\n<ul>\n\t<li>If doing so, the illumination system is uncoupled and twisted slightly to one side so it is no longer coincident with the observation system</li>\n\t<li>The light beam is adjusted to a moderate width</li>\n\t<li>Medium to high magnification can be used</li>\n\t<li>The illumination system is typically angled away&nbsp;from the microscope</li>\n\t<li>The microscope is focussed on the area of interest to the side of the light source&nbsp;</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<h2>Useful when assessing</h2>\n\n<ul>\n\t<li><a href=\"/condition/11\">Corneal Epithelial Edema</a></li>\n\t<li><a href=\"/condition/27\">Corneal Opacities</a></li>\n\t<li>Corneal foreign bodies</li>\n\t<li><a href=\"/condition/39\">Corneal Vascularization</a></li>\n\t<li>Intraocular Lens Opacities</li>\n\t<li>Iris Transillumination</li>\n</ul>\n\n<p>&nbsp;</p>","images":[{"name":"Indirect Retro Illumination","file":"https://cclm-static.s3.amazonaws.com/images/CORE_Indirect_retro_illumination.png"}],"type":1,"videos":[{"name":"Indirect Retro-Illumination","videoSrc":"267426976"}],"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"}]}