The evaluation of geometric distortion is presented for near-eye displays with binocular vision. The true distortion with eye rotation is compared with pupil rotation using a reference goniometer for monocular vision. The left and right eye distortion data is then used to determine the distortion observed for binocular vision.

Phase-resolved OCT and fluorescence microscopy were used simultaneously to examine stereotypic patterns of neural activity in the isolated Drosophila central nervous system. Both imaging modalities were focused on individually identified bursicon neurons known to be involved in a fixed action pattern initiated by ecdysis-triggering hormone. We observed clear correspondence of OCT intensity, phase fluctuations, and activity-dependent calcium-induced fluorescence. behavior by sequential activation of multiple peptidergic ensembles," Curr.

Direct retinal projection technology is a promising approach that can avoid vergence-accommodation conflict. But it introduces new measurement challenges. We demonstrate an evaluation system that can perform spatial as well as direct absolute spectral-based photometric and colorimetric measurements of these devices.

Now day's children are more likely to use smartphones. They would like to use smartphones more than a textbook. They use smartphones for playing various games and watch the cartoon as well as funny videos and movies also. The addiction to using smartphones through children is increasing day by day. Maximum parents now want to teach their children via smartphones. In that case, they try to find various learning apps and games. From that sense, we decide to make a child learning apps by using Augmented Reality & Virtual Reality. AR & VR is the most powerful way of interaction nowadays. On AR apps we design an alphabets book for the children according to our survey report and we make an android app using unity 3D. When a child opens the apps, then the phone camera will open. And if the child holds the camera in any picture of the book, then the smartphone will tell the name of the alphabet and also tell a word with that particular word and will show a 3D visual model of the object on the mobile display. And on the VR apps, we design some 3d environments according to our survey. Inside the environment, there will some alphabets in some fixed placed according to sequence and the child has to collect them by walking inside the environment. When he/she pick any alphabet than the apps will tell the name of the alphabet.

Near‐eye displays often use narrow spectral bandwidth light sources to create virtual images. These sources provide wider color gamuts. However, the measurement instrument's spectral bandwidth and spectral stray light need to be considered. We evaluate these aspects in characterizing the display's color capability.