Your ophthalmologist will examine your eyes to confirm a histoplasmosis diagnosis. They will be looking for two things in particular:
- histo spots
- swelling of the retina, which signals the growth of new blood vessels that are not normal
Your doctor may have you use an Amsler grid to check for histoplasmosis symptoms such as wavy, blurry or dark areas in your vision.
Your ophthalmologist will dilate (widen) your pupils with eye drops. They will look at your retina and other areas in the back of the eye. Your ophthalmologist will look for fluid or blood vessels that are not normal. If you have these signs, your ophthalmologist will take special photographs of your eye. They use optical coherence tomography (OCT) and fluorescein angiography to take these photographs.
OCT uses light waves to make detailed pictures of the area beneath the retina. OCT images show how thick the retina is. They can help your ophthalmologist find swelling and blood vessels that are not normal.
During fluorescein angiography, a dye is injected into a vein in your arm. The dye travels throughout the body, including your eyes. The dye highlights areas of the retina that are not normal.