The lens looks like a perfect bowl shape with the edges flaring outward
The edges do not form a smooth, rounded cup
The contact feels uncomfortable or painful immediately after insertion
The lens shifts too easily or does not sit centered on the eye
The lens seems to pop out more easily than usual
The contact looks flatter than normal when held on your fingertip
The side profile looks more like a saucer than a cup
The edges may feel slightly turned outward when pinched gently
The lens may not adhere well to the eye surface
If the lens has markings, they may appear reversed or harder to read correctly
If you place it on your fingertip and the rim points outward, it is likely inside out