Since betahistine (Betavert) hasn't provided relief after two weeks, your symptoms might not be due to an inner ear fluid issue. Instead, this specific trigger suggests 'visual vertigo' or a visual-vestibular mismatch, where your brain struggles to process reflections and depth. This is a common and highly treatable condition, often managed with specialized physical therapy called vestibular rehabilitation. I gently recommend consulting your doctor or an ENT specialist to explore this possibility and adjust your care plan safely.