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  2. Fluorescein (medical use) - Wikipedia

    en.wikipedia.org/wiki/Fluorescein_(medical_use)

    Fluorescein is a dye which is taken up by damaged cornea such that the area appears green under cobalt blue light. [3] There is also a version that comes premixed with lidocaine. [4] [8] Fluorescein was first made in 1871. [9] It is on the World Health Organization's List of Essential Medicines. [10]

  3. Fluorescein angiography - Wikipedia

    en.wikipedia.org/wiki/Fluorescein_angiography

    The fluorescein is administered intravenously in intravenous fluorescein angiography (IVFA) and orally in oral fluorescein angiography (OFA). The test is a dye tracing method. The fluorescein dye also reappears in the patient urine, causing the urine to appear darker, and sometimes orange. [2] It can also cause discolouration of the saliva.

  4. Indocyanine green angiography - Wikipedia

    en.wikipedia.org/wiki/Indocyanine_green_angiography

    Indocyanine green (ICG) is a water soluble cyanine dye which shows fluorescence in near-infrared (790–805 nm) range, with peak spectral absorption of 800-810 nm in blood. [ 1 ] [ 2 ] The near infrared light used in ICGA penetrates ocular pigments such as melanin and xanthophyll , as well as exudates and thin layers of sub-retinal vessels. [ 3 ]

  5. Confocal endoscopy - Wikipedia

    en.wikipedia.org/wiki/Confocal_endoscopy

    Fluorescein is an FDA-cleared dye that is used in ophthalmology clinics in routine as it appears green under cobalt blue light. [12] It is commonly applied topically to identify corneal diseases with slit lamp microscopes including corneal abrasion , ulcers , and infections ; or intravenously to identify retinal diseases with angiography ...

  6. Current Procedural Terminology - Wikipedia

    en.wikipedia.org/wiki/Current_Procedural_Terminology

    The CPT code revisions in 2013 were part of a periodic five-year review of codes. Some psychotherapy codes changed numbers, for example 90806 changed to 90834 for individual psychotherapy of a similar duration. Add-on codes were created for the complexity of communication about procedures.

  7. Indocyanine green - Wikipedia

    en.wikipedia.org/wiki/Indocyanine_green

    Various dyes are used to stain lens capsule during cataract surgery. In 1998, Horiguchi et al. first described the use of indocyanine green dye (0.5%) for capsular staining to assist cataract surgery. [16] ICG-enhanced anterior and posterior capsulorhexis is useful in childhood cataract surgery. [17]

  8. Tear break-up time - Wikipedia

    en.wikipedia.org/wiki/Tear_break-up_time

    Fluorescein 2% [2] is instilled into the lower fornix of patient's eye. Alternatively, impregnated fluorescein strip moistened with preservative (benzalkonium chloride) free saline solution can also be used. [6] The eye is examined under a slit lamp with a low magnification and a broad beam covering the whole cornea. The lamp is switched to a ...

  9. Schirmer's test - Wikipedia

    en.wikipedia.org/wiki/Schirmer's_test

    Another test involves fluorescein eye drops, which contain a dye that is placed in the eye. The dye should drain with the tears through the lacrimal duct into the nose within 2 minutes. If patients do not have enough tears to flush the dye into the nose, this time will be longer. A new test is also available to more accurately measure the flow ...