Grade I (mild hypertension) | | Mild generalised retinal arteriolar narrowing or sclerosis | | No symptoms |
Grade II (more marked hypertension retinopathy) | | Definite focal narrowing and arteriovenous crossings. Moderate to marked sclerosis of the retinal arterioles. Exaggerated arterial light reflex | | Asymptomatic |
Grade III (mild angiospastic retinopathy) | | Retinal haemorrhages, exudates and cotton wool spots. Sclerosis and spastic lesions of retinal arterioles | | Symptomatic |
Grade IV | | Severe grade III and papilloedema | | Reduced survival |