As there is no soreness, discolouration, pain or discomfort, I am assuming that you do not have any particular issue with your eyes.
When one sleeps well and full and wakes up, it is normal to have a slightly puffed up face and eyes.
By washing face and eyes and involving in routine activities, it disappears. While we are sleeping our inner systems direct more blood to needed areas and do repair work. So for those who work more at desk, on computers, watch TV, do welding works etc involving eye exposure and strain, the inner system takes more care of the eyes and do repair and maintenance of the eyes. So more blood is pumped and some cushioning is given. This makes the eyes/eyelids appear swollen.
Those who sleep on sides mostly with pillow pressed to their chin and eye sides also may see swollen eyelids and chin in the morning on waking up. But all these will vanish soon once the blood flow becomes distributed on our waking and moving around.
However if you see puffing up only on the lower corners of the eye on waking up, and they appear every day consistently, , then that can be early signal of some issue internally. Similarly if the swollen appearance seems like a roll and is seen everyday consistently, then it is a indication of 'pitha' and that should be treated. But that will have additional confirmation signs like lack of lustre in the eyes etc.
As of now it i only a sign that the body inner system has done its repair and maintenance while you had a good sleep. Hence forth try to reduce the strain by reducing continuous work on computer,smartphone, TV watching etc.