I always have headache after studying for a long time. Sometimes, I cannot encode or recall informations. I feel like my brain has limit. Why? O

? Eye Strain. You may be experiencing eye strain from starring at a monitor or it could be plain old stress. Consider resting your eyes periodically by looking into the distance, getting up and moving around. Work on your stress too, consider some counseling to help you deal with thie stress.Just about every student encounters this at one time or another.