Non poisnous snakes
You need to be more specific - that vague description could apply to any one of a thousand species !
snake eyes
Snake eyes
1/36
Slightly less than 18 to 1 against.
The coral snake as well as a number of other elapids, such as the mamba, have an oval-shaped head and round pupils.
Nonpoisonous
There are species of both venomous and nonvenomous snakes with oval eyes. The snake pictured above is a mamba - a deadly species.
As a general rule of thumb, non-poisionous snakes usually have oval shaped heads and round eyes. Venomous snakes tend to have more angular heads and eyes.Nearly impossible to answer here, many snakes have "oval" shaped heads and most of the harmless snakes have round pupils. One venomous snake that would fit this category is the Coral snake.
Nonpoisonous, THIS ANSWER IS NOT TRUE, THE CORAL SNAKE HAS WHAT COULD BE CALLLED AND OVAL SHAPED HEAD AND HAS ROUND PUPILS.
There are both venomous and nonvenomous snakes that meet that description. The image above has round pupils and an oval head. It is the deadly mamba from Africa.
Round
nonpoisonous
You can research the species by its color and its length. If the snake has 'cat eyes' instead of round pupils, it is poisonous. That is not to say that round means it is not poisonous, as there are a few.
The Scottish Fold cats have very large, round eyes.
The word "snake". Snake oil, rattlesnake and snake eyes.
Snake Eyes - album - was created in 1999.