Consult a neurologist first, given the new visual-motion disturbances and difficulty judging distances. An ENT specialist with vestibular expertise may also be appropriate. A neurological examination should assess eye movements, coordination, gait, and balance. Depending on the findings, your doctor may recommend vestibular function testing or a brain MRI if central neurological causes are suspected. Keep a record of episode duration, triggers, associated headache, dizziness, nausea, and whether symptoms improve or worsen during travel. Continue vitamin D supplementation as prescribed, but avoid assuming deficiency is the cause.

Until evaluated, avoid driving or operating machinery if your perception of movement or distance is affected. Maintain adequate sleep and hydration, and take regular breaks from screens if prolonged visual activity worsens symptoms. Seek medical attention if you develop sudden double vision, loss of vision, severe headache, difficulty speaking, weakness, or trouble walking. My recommendation: A vestibular or visual-motion processing disorder is possible. However, because you also report delayed spatial judgement, a neurologist should assess you first, with ENT specialist evaluation if indicated. Brief movement sensations after travel can be normal. Mal de débarquement syndrome is considered mainly when rocking or swaying sensations persist beyond 48 hours, so your symptoms do not establish that diagnosis. With appropriate assessment, the underlying cause can be identified and targeted treatment considered. Wishing you good health!

A neurologist is usually the right first stop for this kind of visual and balance complaint. They can check for vestibular migraine or other inner ear and brain causes. An ENT consult often follows if balance testing points that way. Please continue your vitamin D supplement as advised.

See a doctor sooner if you develop sudden hearing loss, ringing in one ear, or true spinning vertigo.