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Ulucanlar Göz Eğitim Araştırma Hastanesi, Ankara, Doç. Dr. Glaucoma is a chronic neurodegenerative disease characterized by loss of retinal ganglion cells, resulting in distinctive changes in the optic nerve head and retinal nerve fiber layer. Early diagnosis is critical to prevent permanent structural damage and irreversible vision loss. Detection of glaucoma typically relies on examination of structural damage to the optic nerve combined with measurements of visual function. Confocal scanning laser ophthalmoscopy provides reproducible 3-dimensional images of the optic disc and peripapillary retina. This imaging technology (Heidelberg retina tomograph-HRT), is widely used in the assessment of structural damage in the glaucomatous optic disc. The principal goals of HRT are to assist the user in discriminating between normal and glaucomatous discs and to identify progression. In this rewiev, technical characteristics and diagnostic accuracy of the confocal scanning laser ophthalmoscopy were evaluated. Keywords : Glaucoma, confocal scanning laser ophthalmoscopy, optic nerve head