Retinal Detachment 3-4 Times A Day, I Have A Streak Of Light Arching Across The Top Of My Eye. Is This Retinal Detachment?

3-4 times a day, I have a streak of light arching across the top of my eye. Is this retinal detachment? - retinal detachment

I also have a shadow from time to time in the tip of my right eye. Was this for a few months, unchanged. I'm nearsighted -5.5 in each eye. Should I be concerned about retinal detachment? My vision is fine.