|学科||生物医学工程 BIOMEDICAL ENGINEERING|
|学校||Canyon Crest Academy|
|国家/州||CA，United States of America|
Smartphone-Controlled Portable Phoropter Powered by Variable Focal Length Liquid Lens
In order to determine corrective eyeglass prescription, large and expensive phoropters, devices which use precisely machined lenses to subjectively determine the prescription providing the clearest vision. Can a cheaper, portable device be designed to accurately determine the degree of spherical impairment? The hypothesis is if a voltage-controlled liquid lens is used to change the focal length used to view a screen projected to optical infinity, the final voltage of the lens that provides the clearest vision can be used to determine the correct eyeglass prescription.
A liquid lens was selected for the ability to change focal length in response to applied voltage. The Arduino board was wired to the Liquid Lens Driver IC, and I programmed a C++ script that provides I2C commands to direct the applied voltage in response to wireless calls to a custom-implemented REST API. I programmed an app for the smartphone that runs the algorithm to zero in on the prescription by displaying pairs of lens powers and allowing the user to select which of the two is clearer with push-button input. The smartphone also displays a LogMAR visual acuity chart to give a point of reference for subjective clarity. An array of lenses was designed in order to project the test chart to a virtual image at optical infinity.
The sample data provided the following linear regression:
(Official Prescription Power in Diopters) = 0.3235 * (Final Lens Voltage) - 17.8150
with R^2 = 0.8350
The data from 26 eyes yielded a linear relationship with a relatively large R^2 value of 83.50%: relationship being accounted for by the regression strongly supports the hypothesis that the final lens voltage can be used to determine the spherical eyeglass prescription.
高中生科研 英特尔 Intel ISEF
资讯 · 课程 · 全程指导
英特尔国际科学与工程大奖赛，简称 "ISEF"，由美国 Society for Science and the Public（科学和公共服务协会）主办，英特尔公司冠名赞助，是全球规模最大、等级最高的中学生的科研科创赛事。ISEF 的竞赛学科包括了所有数学、自然科学、工程的全部领域和部分社会科学。ISEF 素有全球青少年科学竞赛的“世界杯”之美誉，旨在鼓励学生团队协作，开拓创新，长期专一深入地研究自己感兴趣的课题。
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学科简介：生物医学工程 BIOMEDICAL ENGINEERING
Projects that involve the application of engineering principles and design concepts to medicine and biology for healthcare purposes including diagnosis, monitoring and therapy. Prominent biomedical engineering applications include the development of biocompatible prostheses, various diagnostic and therapeutic medical devices ranging from clinical equipment to micro-implants, common imaging equipment such as MRIs and EEGs, regenerative tissue growth, pharmaceutical drugs and therapeutic biologicals.
Biomaterials and Regenerative Medicine (BMR): These studies involve the creation or use of biomaterials or biocompatible materials to construct a whole or a part of a living structure. These studies can include scaffolds for recruiting or supporting regenerative cells or tissues or the engineering designs for creating the correct environment for regenerative growth.
Biomechanics (BIE): Studies that apply classical mechanics (statics, dynamics, fluids, solids, thermodynamics, and continuum mechanics) to understand the function of biological tissues, organs, and systems and solve biological or medical problems. It includes the study of motion, material deformation, flow within the body and in devices, and transport of chemical constituents across biological and synthetic media and membranes.
Biomedical Devices (BDV): The study and/or construction of an apparatus that use electronics and other measurement techniques to diagnose, prevent and/or treat diseases or other conditions within or on the body.
Biomedical Imaging (IMG): The study and/or construction of an apparatus or technique that combines knowledge of a unique physical phenomenon (sound, radiation, magnetism, etc) with high speed electronic data processing, analysis and display to generate an image to support biomedical advances and procedures.
Cell and Tissue Engineering (CTE): Studies that utilize the anatomy, biochemistry and mechanics of cellular and sub-cellular structures in order to understand disease processes and to be able to intervene at very specific sites.
Synthetic Biology (SYN): Studies that involve the design and construction of new biological parts, devices and systems. Such studies include biological circuit design, genetic circuits, protein engineering, nucleic acid engineering, rational design, directed evolution and metabolic engineering.
OTH Other (OTH): Studies that cannot be assigned to one of the above subcategories. If the project involves multiple subcategories, the principal subcategory should be chosen instead of Other.