MIT媒体实验室的研究人员开发出一款 智能手机应用软件，让用户能衡量自己眼睛的屈光不正（如近视、远视和散光），并提供矫正屈光不正的方法。

用户从一个售价2美元的光学适配器注视智能手机的屏幕，应用程序会在上面展示发光的条纹，通过调整显示器直至条纹对齐。然后用户需要在不同地点和不同方位 重复进行上述操作。这款应用程序在不同清晰度的智能手机上有不同的效果。以Nexus One手机为例，它能帮助判断出0.4屈光度以 内的屈光不正，而清晰度更高的iPhone 4手机，则能提高至0.28屈光度以内。在缺乏有经验的眼科医生和诊断设备的发展中国家，这种廉价的诊断屈光不正的方法将能得到广泛应用。

这里有视 频（Mov）。详细的论文资料：

NETRA: Interactive Display for Estimating

Refractive Errors and Focal Range

Vitor F. Pamplona*         Ankit Mohan Manuel M. Oliveira*        Ramesh Raskar Camera Culture Group - MIT Media Lab * Visiting from Instituto de Informática - UFRGS

To appear at ACM SIGGRAPH 2010

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Ilustration: Tiago Allen

Figure 1: Can a person look at a portable display, click on a few buttons and recover his refractive condition? Our optometry solution combines inexpensive optical elements and interactive software components to create a new portable and inexpensive optometry device.

Abstract

We introduce an interactive, portable, and inexpensive solution for estimating refractive errors in the human eye. While expensive optical devices for automatic estimation of refractive correction exist, our goal is to greatly simplify the mechanism by putting the human subject in the loop. Our solution is based on a high-resolution programmable display and combines inexpensive optical elements, interactive GUI, and computational reconstruction. The key idea is to interface a lenticular view-dependent display with the human eye at close range - a few millimeters apart. Via this platform, we create a new range of interactivity that is extremely sensitive to parameters of the human eye, such as the refractive errors, focal range, focusing speed, lens opacity, etc. We propose several simple optical setups, verify their accuracy, precision, and validate them in a user study.

Paper

• High Resolution (7MB)
• Low Resolution (600K)

Citation: Vitor F. Pamplona, Ankit Mohan, Manuel M. Oliveira, Ramesh Raskar. NETRA: Interactive Display for Estimating Refractive Errors and Focal Range. Proc. of SIGGRAPH 2010 (ACM Transactions on Graphics 29, 4), 2010.

Bibtex:

@article{Pamplona_et_al_2010,
  author = {Vitor F. Pamplona and Ankit Mohan and Manuel M. Oliveira and Ramesh Raskar},
  title = {NETRA: Interactive Display for Estimating Refractive Errors and Focal Range },
  journal = {ACM Transactions on Graphics (proceedings of ACM SIGGRAPH)},
  year = {2010},
  volume = {29},
  number = {4},
}

Videos

MIT Media Lab LabCast: Credit, Paula Aguilera and Jonathan Williams

Pictures

• Group Picture

NETRA team: Ankit Mohan, Manuel M. Oliveira Neto, Vitor Pamplona and Ramesh Raskar at the MIT Media Lab.
Photo: Jonathan Williams

• Individual Pictures

Vitor Pamplona demonstrates NETRA	Vitor Pamplona demonstrates NETRA
Manuel M. Oliveira demonstrates NETRA	Manuel and Vitor
Ramesh Raskar demonstrates NETRA	Ramesh and Ankit
Ankit Mohan demonstrates NETRA	Ankit Mohan demonstrates NETRA

• IDEAS Competition

Vitor Pamplona, Margaret McKenna, Ankit Mohan and Chika Ekeji. Photo by Xun (Helen) Hou	Vitor Pamplona, Margaret McKenna, Ankit Mohan and Chika Ekeji. Photo by Xun (Helen) Hou
Margaret McKenna, Chika Ekeji, Ankit Mohan and Vitor Pamplona. Photo by Xun (Helen) Hou	Photo by Xun (Helen) Hou

• Prototypes in action

Photo: Michal Massey

• User study and Experimental Validation

• One of our team members visiting an Optometrist

• Initial Exploration