The diagnosis of Stargardt disease involves comprehensive eye examinations to identify eye conditions leading to vision loss. Following your doctor's physical examination and evaluation of your medical history, the following tests may be performed:

* Comprehensive Eye Exam: Conducted to investigate problems with visual acuity and visual field.
* Optical Coherence Tomography (OCT): Provides non-invasive and detailed imaging of the retina's layers.
* Fundus Photography: Captures images of the retina and macula region, revealing characteristic yellowish lipofuscin deposits in the retina.
* Fluorescein Angiography: Used for a detailed examination of the structure and blood flow of retinal vessels.
* Electroretinography (ERG): Measures the electrical responses of light-sensitive cells in the retina, helping to identify damaged cells.
* Genetic Test: May be performed for a definitive diagnosis of the disease, specifically to detect mutations in the ABCA4 gene.