The provided UK guideline excerpts do not contain specific information regarding when to refer a patient with branch retinal artery occlusion to a specialist, nor what information should be included in such a referral.
However, the guidelines do discuss urgent referrals for other ophthalmic conditions. For instance, urgent referral to ophthalmology assessment and investigations is recommended for suspected age-related macular degeneration (AMD), ideally within 1 week NICE CKS. This is particularly important if the patient presents with visual distortion (metamorphopsia) or rapid-onset visual loss, as these symptoms may indicate neovascular AMD, for which prompt treatment can improve visual outcomes NICE CKS,NICE CKS.
For corneal superficial injuries, immediate referral to ophthalmology is recommended for penetrating ocular injuries or chemical burns after copious irrigation NICE CKS. Referral is also advised if a foreign body cannot be safely removed in primary care, or if a rust ring is present NICE CKS.