If an image of an object formed by convex lens is simply meeting of the rays of the object due to refraction,then why do we require a screen to reflect these refracted rays?If we observe the image formation from the side the image is forming,shouldn't the rays of the image reach our eyes without a screen?
Right, you see the image in the same place when the screen is removed (You don't need the magnifying glass).
Your form an image of your object on the screen. Your eyes, to see things need to do the same. Do not forget that when using the screen there are no more lenses. But if you look into the rays coming from the lens, you now include also your own eyeball lenses into the optical beam path. Your retina, at the back of your eyes IS the screen.
Putting it in different words, when you look at an object, your eyes and retina are doing exactly the same as the lens and screen you proposed. In a way, you are seeing how your eye works!! Except that instead of having a screen you have cells which are sensitive to light!