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STUDY TO MEASURE WHETHER THE TARGET MOVES OR THE FINGER MOVES WHEN THE SUBJECT AIMS AT THE TARGET BY CLOSING ONE EYE AND ITS RELATION WITH THE DOMINANT EYE

STUDY TO MEASURE WHETHER THE TARGET MOVES OR THE FINGER MOVES WHEN THE SUBJECT AIMS AT THE TARGET BY CLOSING ONE EYE AND ITS RELATION WITH THE DOMINANT EYE.

OBJECTIVE-A study was conducted by doing a research on 7 subjects to check whether
the target moves or the hand moves when aiming is done by closing one eye alternatively and also to find whether this has any relation with the dominant eye of the subject or not.

INTRODUCTION-Both the eyes are used to judge the depth perception,but when we aim
at any target like we do in shooting or other aiming sports,we invariably close our one eye and then aim.By closing one eye,it is being seen that aiming can be done more precisely and accurately,in spite of the fact that closing one eye reduces peripheral awareness and contrast sensitivity.Aiming eye has to be in line with the object as well as the target like with bat in cricket to make contact ,resulting in poor performance.

TOOLS USED- No apparatus as such were used to do the research.The subjects were selected randomly from our own practice irrespective of their occupations.They were asked to aim at the pen held in hand by the observer by using their forefinger.It was a double masked study in which the subjects did not know how their results would be interpreted and also the observer did not know which eye the subjects will close to aim.

DISCUSSION- The subjects were asked to aim at the pen shown by the observer.As soon as the subjects raise their finger to aim at the pen ,they close their non dominant eye and aim with their dominant eye.Then they were asked to close the eye with which they aimed first and open the other eye.When the vision changes from dominant eye to non dominant eye—there is a shift in either the object or the target.In our study hands were used as object to target at the pen.The subjects were asked the same question.Hand movement was the predominant in our study.6 out of 7 said that it was the hand which moved and not the pen.One subject noticed the movement of pen,i.e, target.When they were asked that which side the hand is moving ,they all said it is moving towards the dominant eye.The subject who said that the target moves ,he only said that it is moving towards the non dominant eye. For our academic interest we also asked the subject to try and aim with their both eyes open.All of them noticed the blur and slight diplopia while aiming with both eyes open.

CONCLUSION—

When vision changes from dominant eye to non dominant eye, the brain swaps the image. It does not say anything. The object appeared to shift towards the dominant eye. So aiming with non dominant eye results in misalignment with the target. Dominant eye has to be in line with the target to hit correctly.