MIE.21 – Tonometer Device Camera

• Mebin George
• Ana Karapetiani
• Konrad Materna
• Adam Scheid
• Hannah Waller

The use of a Tonometer is used to examine and determine the health of a patient’s eyes. This device is used to measure the pressure and examine the blood flow in the eye by placing the device close to the eye. The team’s task was to research a suitable camera and build a prototype to assist in eye examinations. Testing eye pressure allows for the examination of a patient’s health and is particularly useful in diagnosing chronic diseases such as Glaucoma. The tonometer is commonly used to test for these diseases by flattening the eye and allowing for a better view of the blood vessels. The tip of the tonometer is a clear prism that splits into two semicircles, making it easier to view through a camera. The goal of the project is to improve the quality of images and videos captured by the tonometer camera to allow for a proper diagnosis and prevent health problems for patients. The team plans to achieve this by modifying the tonometer, adding a green LED light source to enhance image quality, and selecting a camera with a higher megapixel count and better autofocus. Since the camera is used to get a magnified view of the eye, camera quality and performance will be the main priority. The first prototype was made using a cost-effective camera and lens system. The system was tested several times by seeing how the camera focused and magnified against items at similar distances as the patient’s eye would be. However, the initial results were disappointing because the magnification and autofocus were not at the level needed to improve the overall device. Initial prototypes were improved by selecting a higher specification camera that included a higher megapixel count for better overall quality. The initial design also had flaws with autofocus and magnification, which were then solved after implementing the device with a more powerful lens capable of 40 times magnification. The final product is able to produce a clear picture and it is capable of focusing by itself when the distances are changed. This magnification level would allow the team to get the desired results in a real-world application. The project will improve the outgoing system and the operator will be able to diagnose the patient and analyze their eye, which can prevent diseases and it can improve patient outcomes and quality of life.