Red dot sights are very useful in that they enable you to shoot with either both eyes open or just one, the head position is not so important and there is less eye strain. You should  also find that your accuracy will  improve.

Standard 1x30 red dot sight, powered by an integral CR2032 lithium battery. The red dot is adjustable in two axis and also has a variable intensity with 7 power settings, coated optics. Supplied with mounts, allen key, lens caps,  smoked filter and sun shield.