Which of the following is NOT listed as part of testing for Ocular Ischemic Syndrome (OIS)?

• A. Macular OCT
• B. Fluorescein Angiography (IVFA)
• C. Gonioscopy
• D. Fundus photography

Answer: (D)

Ocular Ischemic Syndrome testing focuses on assessing ocular blood flow and ischemic changes rather than just static structure. Fluorescein angiography is used to evaluate retinal arterial filling and capillary perfusion; delayed filling and nonperfusion indicate hypoperfusion consistent with OIS. Macular OCT is helpful because ischemia can affect the macula, revealing thickness changes or disruption that reflect ischemic damage. Gonioscopy is included to look for iris and angle neovascularization that can arise from chronic ischemia and to assess the risk of neovascular glaucoma. Fundus photography documents retinal and optic nerve appearance, but it does not provide functional perfusion data or a direct measure of ischemia, so it isn’t considered a key test for confirming OIS.