bmdo technologies for biomedical applications - MDA Technology

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AMT: BINOCULAR3-D EYE TRACKER• A novel wavefront sensor can helpdoctors remotely diagnose eye disorders.BMDO HISTORYApplied Modern Technologies Corporation (AMT; Huntington Beach, CA)has developed an eye-tracking device based on wavefront sensor technologyborrowed from adaptive optics. In the 1980s, BMDO focused muchattention on how light, particularly high-energy laser light, was propagatedthrough the atmosphere. This interest generated a host of techniques tocorrect the scatter of light in turbulent air,improving both transmission and detectionWhile our view of theof light. The astronomy field has benefitedgreatly from advances in adaptive optics—world may seem smoothfor example, using it to remove the “twinkle”from galactic objects—but other areasand uninterrupted to us,of science are also reaping the rewards ofthe continual, jerky this technology. AMT’s Ocular Vergence andAccommodation Sensor (OVAS) is a newmovements of the eye are product for the vision sciences and medicalresearch that can trace its lineage to BMDOessential to maintainingadaptive optics technology.this clear image.HOW IT WORKSOVAS uses two low-power (1.25 milliwattsParadoxically, if these eyeper square centimeter; eye-safe) infraredlaser beams that are reflected from eachmovements are artificiallyeye’s retina. The reflection provides informationabout the movement of the eyes andstilled, the world becomesother biometric data that can be processeda defocused blur.and used for a variety of applications. AMT’sdesign includes a 12-component optics systemand a Pentium processor with algorithmsfor processing data on the accommodative state, movements, andvergence of the eyes, as well as 10 other ocular functions.44MEDICAL SIGNIFICANCETelemedicine. OVAS could provide diagnostic data from a patient to a doctormany miles away. The application to soldiers in the field includes earlydetection of exposure to chemical warfare agents. The AMT system isrugged enough for battlefield conditions and can be miniaturized for integrationinto a portable, head-mounted system. OVAS is proposed as partof a testbed project for remote ophthalmic instruments for the TriplerArmy Medical Center. The center’s responsibilities include health care forthe U.S. South Pacific Protectorate. Doctors are scarce on these smallislands, and often the citizenry and military personnel must make do withlimited immediate medical care. With OVAS, an ophthalmologist at aremote location may be able to evaluate a Tripler patient’s eyes for correctiveeyewear and for such conditions as cataracts and diabetic retinopathy.Chapter 2 - Observation TechnologiesSection C - DiagnosisBMDO Technologies for Biomedical Applications
The South Pacific population experiences a very high rate of diabetes-relatedblindness.Ophthalmology and Optometry. OVAS is an automated system that candetermine prescription lens strength, astigmatism, interpupil distance, andaccommodation. Because OVAS is binocular, both eyes are measuredsimultaneously. AMT feels this is superior to the current practice, whichmeasures each eye separately. Potentially, lens prescriptions could be balancedto reduce the dominant-eye effect now common for correctedvision. Future units can be used to precisely measure the minute aberrationsof the cornea, helping to fit contact lenses or to determine the depthof abrasions. In surgery, OVAS could identify astigmatism introduced bythe surgery and allow immediate correction. The benefits extend to schoolchildren for a quick, accurate eye-screening device and to faster, more indeptheye exams requiring no feedback from the patient.Other Medical ApplicationsFor those who are paralyzed or seriously restricted in their ability to move,eye movement sensors have been in use for some time. With an “ocularmouse,” the user can look at an icon or array of letters on a monitor to initiatea program function or spell out words. These assistive computer interfacesadd immensely to the quality of life of such individuals, and sensorsthat can accurately track eye movement are crucial to the technology.Medical students, residents, and interns are taking increasing advantage ofvirtual reality (VR) for educational purposes. Surgical trainees can nowpractice such procedures as laparoscopies on a VR simulator before movingon to real patients. VR also needs eye movement and focusing informationfor its next-generation products.VENTURES OR PRODUCT AVAILABILITYAMT has applied for 89 patents related to OVAS and is marketing aresearch version of OVAS aimed at the medical market. This includes studieswhere OVAS’ data points are used for statistical analysis and includevision research, neuro-ophthalmology, display research, VR research, andscene generation. OVAS is suitable for office, laboratory, or mobile use.CONTACTApplied Modern Technologies CorporationLarry Horwitz, Ph.D.12062 Valley View Street, Suite 101Garden Grove, CA 92845-1738Telephone: (714) 379-2870Facsimile: (714) 379-2873Email: larry@amtvis.comWWW: http://rworld.compuserve.com/homepage/ovas45BMDO Technologies for Biomedical ApplicationsChapter 2 - Observation TechnologiesSection C - Diagnosis
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