LogOn Smartphone Eye Exam (ການໃຊ້ໂທລະສັບມືຖືກວດເບິ່ງສາຍຕາ)

A visit to the eye doctor may be one of those appointments people tend to put off. Now, one company has come up with a way for patients to administer their own eye exam using their smartphones. Tina Trinh reports.