In this work, we study the enhancement of simulated prosthetic reading performance through "active photonic sensing" in normally sighted subjects. Three sensing paradigms were implemented: active sensing, in which the subject actively scanned the presented words using the computer mouse, with an option to control text size; passive scanning produced by software-initiated horizontal movements of words; and no scanning. Our findings reveal a 30% increase in word recognition rate with active scanning as compared to no or passive scanning and up to 14-fold increase with zooming. These results highlight the importance of a patient interactive interface and shed light on techniques that can greatly enhance prosthetic vision quality.
The ability to measure the blood lactate level in a non-invasive, non-contact manner is very appealing to the sports industry as well as the home care field. That is mainly because this substance level is an imperative parameter in the course of devolving a personal workout programs. Moreover, the blood lactate level is also a pivotal means in estimation of muscles' performance capability. In this manuscript we propose an optical non-contact approach to estimate the concentration level of this parameter. Firstly, we introduce the connection between the physiological muscle tremor and the lactate blood levels. Secondly, we suggest a photonic optical method to estimate the physiological tremor. Lastly, we present the results of tests conducted to establish proof of concept to this connection.
Purpose: To investigate the characteristics of mask wearing and the effect of masks on visual symptoms and clinical measurements in a sample of ophthalmic patients in Ghana. Methods: A clinic-based cross-sectional descriptive study was conducted among ophthalmic patients who visited two primary care eye clinics in the Central Region of Ghana. Participants included 71 randomly sampled patients aged 18 years and above and consented to take part in the study. Their mean ages (SD) was 36.94±17.46 and they were made up of 27(38%) males and 44(62%) females. The patients responded to symptoms assessment questionnaire before their visual acuity (VA) for distance and near and IOPs with and without their face masks were measured. Results: The majority 45(63.4%) of the patients’ used fabric masks and 25(35.2%) reported ocular problems with the use of the masks. Of those who observed ocular problems, 8(32%) observed problems with the use of spectacles, and 5(20%) also observed problems with their vision. The mean difference in distance VA with and without face mask for the right eye was 0.08(0.36) and left eye was 0.05(0.25) MAR, indicating slight aberrations in vision. Mean differences in measurements with and without face masks were not statistically significantly different ( P < 0.05). A higher proportion of persons wearing KN95 experience nausea or headaches (ꭓ=18.610, p<0.001) and discomfort of wearing of nose mask (ꭓ=7.803, p=0.020). None of those wearing a fabric face mask reported of difficulty in accurately reaching for objects with the nose mask on. (ꭓ= 8.664, p=0.13). Conclusion: Face masks may exacerbate oculo-visual symptoms in ophthalmic patients, which practitioners must pay attention to.
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