A thesis from Iowa State University: Using Google Cardboard to perform a visual field screening test . “The visual field test is used to detect areas on the retina where there is a loss of vision. The equipment used to conduct the test is bulky and can cost a significant amount to patients to take the test. Google Cardboard is an inexpensive headset which is paired with a mobile phone to run virtual reality applications. In this work, a visual field screening test is developed to enable people to do an eye exam with a low-cost and portable device such as a Google Cardboard and a smart phone. The Google Cardboard application helps reduce the cost of performing a visual field test by enabling a patient to do a self-administered visual field test before going into a clinic or hospital to do a more detailed eye exam. The patient can perform the test at home and with greater frequency, indications of advancing vision loss can be identified and treated earlier to prevent any irreversible damage to the eye caused by diseases.” The thesis is available for download from this page.