Hi, Welcome to HCM, I have gone through your question and understand your concerns. Your dizziness or light feeling could be due to - eye( errors of refraction) cervical spine( spondylitis) ear( bppv, meniers disease, vestibular neuronitis). any fluctuations in Bp, any fluctuation in blood sugar or electrolyte disturbances.kindly evaluate with blood tests, ent examination to rule out d cause. Hope, I have answered your query. Wishing you good health.