Ophthalmic Diagnostic Testing

Eye exams can catch many eye problems early. When more information is needed, ophthalmic diagnostic testing can help your eye doctor determine the exact cause of your symptoms.

Guthrie’s diagnostic technicians and photographers offer a number of testing options. Most tests can be ordered and performed in the office the same day as your exam.

Ophthalmic Tests Available at Guthrie

  • Corneal topography is a computerized test that creates a map of the outline of your cornea. It can show astigmatism or problems with the surface of your eye, such as swelling.
  • Fluorescein angiogram shows how well the blood is moving in your retina. Fluorescein dye is injected into your arm and travels to your eyes. Pictures of the dye can reveal circulation problems and help diagnose diabetic retinopathy, retinal detachment and macular degeneration.
  • Indocyanine green angiography (ICG) is similar to a fluorescein angiogram but uses a different dye.
  • Fundus photography takes pictures of the rear of the eye, including the retina, macula and optic disc. Fluorescein angiogram and ICG are types of fundus photography.
  • IOL Master uses laser technology to measure the length of the eye. This test allows cataract surgeons to choose the correct lens for each patient.
  • Optical coherence tomography uses light waves to take pictures of your retina. These pictures can help diagnose retinal conditions and glaucoma.
  • A visual field test measures peripheral, or side, vision. You will stare at an object and note when another object moves into your field of vision.
  • Ultrasound can be used to take pictures of the inside of your eye. An A-scan measure the length of the eye, helpful when choosing the correct lens for cataract surgery. A B-scan provides information about the inside of the eye.