Description

1. Introduction 

Nowadays, in this world of emerging technologies, we are aiming for a hassle-free form of life in a higher demand because of the immense growth of accessible services at all levels. As we know, any software application or gadget invention is aimed to serve the purpose of the user or for the ease of working conditions in a company. In order to achieve complete satisfaction from the users, many industries are looking out for ways to adapt the concept of human behaviour in their research which in turn results as a remark of product or a service after development. For certain products, several possibilities of how a human react or respond is taken into consideration before designing the features for a product or which are to be attained during implementation of their idea by the companies before manufacturing a product. 

The most extensively used technique to study human cognition in present era is eye tracking. It enables to record and keep a track of eye movements precisely and bring out substantial information. It also provides a platform of new approaches which are related to the research of human perception and behaviour. In contrast to eye tracking in real world, using eye tracking in virtual reality (VR) much more convenient to define regions of interest in 3D space and maintain a track of points in time to know when the regions were looked at [2]

Background

 In a visual environment when eye movements of a person are detected and examined, it is very convenient and helpful for getting information to analyse cognitive process. Various uses of eye tracking in variety of areas include applications of marketing, multimedia learning, problems faced by dyslexia and autism patients can be known. We can detect autism symptoms through eye movements as one of the signs is that it is really difficult to look at faces of people when they have this ailment and these are considered as some of the signs of early autism[1]. There are many ways to measure eye movements like electro-oculography which tells only about movement of eye in relation to position of head of the person but doesn’t tell any about what position a person looks at. Video based eye tracking, head mounted and tower mounted are some other ways though not very common but are used at present for specific purpose[1].