Floaters and flashes

I have been seeing sudden onset of flashes and floaters. I do see floaters occasionally in the past but about one month ago I started seeing an increase in number of floaters especially under bright light like day time.

I have seen an eye specialist to get my retinal checked and he said nothing is wrong with my retinal.
I am just wondering is it possible for me to have a retinal tear/detachment without the doctor noticing it? And how long will it take for one who has retinal tear/detachment to develop obvious symptoms like the 'casting shadows'?

And how does it actually feel for one to feel that their eyes are 'heavy'?

[Ray T Oyakawa, MD]

Flashes and floater do not always lead to a retinal tear.  Probably less than 0.5% develop a tear.  About 35% of eyes (1974 study-most recent) have a retinal detachment if you after an acute  tear.

You still need to have follow up as long as symptoms persists or increase.

Dr. O.

[hazelynutz]

But I have no idea if the increase in flashes I am seeing have always been there or I just started noticing it after getting to be very sensitive to my vision. Is there any other symptoms which I can take note of to know if I have retinal tear/detachment?