Asymptomatic retinal tears can occur. They are less likely to cause a retinal detachment.
Dr. O.
Retinal detachments: who’s at risk
Those w/ a family history of RDs, high myopia, previous eye surgery, previous eye trauma/injury, weak spots in the peripheral retina, having an RD in the fellow eye, as well as those w/ certain conditions such as Diabetes, Marfan’s, ROP, etc. are at greater risk for developing an RD
Retinal detachments: symptoms
flashes of light, which may look like camera flashes, or lightning bolts, visible during the day, but more likely to be seen at night or dim lighting
floaters, these come in many shapes and sizes, if you notice an INCREASE or sudden onset of these than take warning
black curtain or veil, if you notice any sign of visual loss go see an eye doctor immediately
To read more search for my post: FYI: Retinal Detachment 101