| Artifact | Cause | Solution | | :--- | :--- | :--- | | | Eyebrow/lid blocking light | Manually lift lid; patient opens wide | | Corneal light reflex | Dry cornea; light scatter | Use artificial tears; reposition fixation | | Out of focus (hazy) | Improper working distance | Rock joystick back/forth until vessels are sharp | | Vignetting (dark circle) | Pupil too small (<3mm) | Redilate; use non-mydriatic mode | | Orange/Red overexposure | Flash too strong | Lower flash intensity (macula needs less flash) |
Explain how software stitches 3, 5, or 7 images together to create a panoramic view of the retina. fundus photography ppt
: The retinal image returns through the central un-illuminated "hole" of that same doughnut to avoid reflections from the cornea . | Artifact | Cause | Solution | |
Retina, optic disc, macula, fovea, and retinal blood vessels. Slide 3: Indications & Clinical Purpose Documentation: Creating a baseline for future comparison. Diagnosis: Identifying conditions like Diabetic Retinopathy (spots of bleeding, vessel abnormalities) and (optic nerve changes). Monitoring: light scatter | Use artificial tears