• Title, Summary, Keyword: Eyeball Movement

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Man-machine interface using eyeball movement

  • Takami, Osamu;Morimoto, Kazuaki;Ochiai, Tsumoru;Ishimatsu, Takakazu
    • 제어로봇시스템학회:학술대회논문집
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    • pp.195-198
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    • 1995
  • In this paper We propose one computer interface device for handicapped people. Input signals of the interface device are movements of eyeballs and head of handicapped. The movements of the eyeballs and head are detected by an image processing system. One feature of our system is that the operator is not obliged to wear any burdensome device like glasses and a helmet. The sensing performance of the image processing of the eyeballs and head is evaluated through experiments. Experimental results reveal the applicability of our system.

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Development of 3 DOF Parallel Spherical Robot for Artificial Eyeball (인공안구 구현을 위한 병렬 구조의 3자유도 회전 로봇 개발)

  • Park, Sung Ryung;Yang, Seung Han
    • Journal of the Korean Society for Precision Engineering
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    • v.31 no.6
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    • pp.535-541
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    • 2014
  • In this research, three degree-of-freedom parallel spherical robot is developed for an artificial eyeball. The proposed system is comprised of a moving and a base plate, three prismatic actuators, and a ball joint for an angular movement of the moving plate. The vector analysis is employed to investigate the relationship between positions of the actuators and a pose of the moving plate. The required ranges for every actuators are calculated using the derived inverse kinematics in regard to the combination of two different levels for the size of the system component. Then the size of every components is determined from the analyzed trend. PI controller is employed for the position control of the moving plate. Finally the proposed system is verified using an arbitrary path of the angular movement.

A Idiopathic Oculomotor Nerve Palsy Patient Treated by Acupuncture Complex Therapy (특발성 동안신경 마비환자 치료 1례에 대한 증례 보고)

  • Lee, Chang-Hee;Lee, Chul-Hwi;Park, Min-Kyu;Jung, Won-Hee;Choi, Byoung-Sun;Hong, Kwon-Eui;Lee, Jae-Min
    • Journal of Acupuncture Research
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    • v.27 no.4
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    • pp.233-238
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    • 2010
  • Objectives : This study is designed to find out the improvement of eyelid ptosis and eyeball movement trouble caused by idiopathic oculomotor nerve palsy after diagnosing the patient to Ghan-shil (肝實), Bee, Shin-hur(脾腎虛) and treating the patient with acupuncture and herb medicine. Methods & Results : The changes in clinical symptoms of eyelid ptosis and eyeball movement trouble were described as the patient was treated with acupuncture therapy and herb medicine, Shae-ghan-san gagam(洗肝散加減) and Yukmi-jihwang-tang gagam(六味地黃湯加減). Conclusions : The patient was treated by acupuncture, herb medicine on idiopathic oculomotor nerve palsy for 6 weeks and showed good effect.

DIPLOPIA AND INFEIRO RECTUS MUSCLE PALSY AFTER POSTERIOR SUPERIOR ALVEOLAR NERVE BLOCK (후상치조신경 마취 후 발생된 복시 및 하직근 마비;발생기전에 관한 고찰)

  • Kim, Woon-Kyu
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.23 no.5
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    • pp.461-470
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    • 2001
  • A unhealthy 58-year-old male patient required extraction of left upper second molar due to advanced periodontitis. Lidocaine contained 1 : 100000 epinephrine for left posterior superior alveolar nerve block was administered in the mucobuccal fold above the second molar to be treated at the local private dental clinic. After four hours of posterior superior alveolar block anesthesia, patient feeled double vision and discomfort of eyeball movement. At next day, he complained difficulty of left eyeball movement, vertigo and diplopia. He was referred to our department via local clinic and department of ophthalomology of our hospital. He was treated by medication and eyeball exercise, and then follow up check. The double vision and medial rectus muscle palsy disappeared patially after 2 months of block anesthesia. We described herein an ocular complication of diplopia and inferior rectus muscle palsy after posterior superior alveolar nerve block for extraction of left upper second molar, and review the cause or origin of this case. The autonomic nervous system is presented as the logical basis for the untoward systems of ophthalmologic sign likely to diplopia and inferior rectus muscle palsy, rather then simple circulation of anesthetic solution in the vascular network.

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Landscape Design Method of Bridges and Visual Safety Estimation of Structural Shape (교량의 경관설계 방법과 구조형상의 시각적 안전성 평가)

  • Yang, Seung Hyoun;Shiomi, Hiroyuki
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.2 no.3
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    • pp.235-244
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    • 1998
  • In the design of bridges, the points of concem are the landscape design, the function, safety and economical efficiency. But most of studies have been performed on structural engineering. The study on the landscape design of bridges has not been done in korea. Therefore, in this research, the design method of bridges by the judgement of structural engineering and landscape engineering has been proposed, through the process to decide the shape of bridges. Also, the research studies a problem about the visual safety of the structural shape in the landscape design of bridges. The visual experiments applied to the seven models about the shape of hunch in bridge pier. The experiment was made in moving velocity of view point, steady looking time and track of eyeball movement.

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Improvement of the performance of EOC Amp in AOC method using microprocessor (마이크로프로세서를 이용한 AOC 방식에서 EOG 앰프 성능 개선)

  • 고석남;이상세;정호춘;임승관;이영석;진달복;박병림
    • Proceedings of the IEEK Conference
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    • pp.218-221
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    • 2000
  • The electronystagmography(ENG) means to measure and record CRP(Corneal-Retinal Potential) whenever the eyeball is moved by using a skin electrode stuck to the hi-temporal and the difference of CRP. Both the horizontal and vertical movement are known according to the position of the stuck skin electrode. In this paper, the variable time-constances to record the eyeball signal of the conventional EOG(Electro-Oculograph) Amplifier is chosen. The shorter the time-constance is, the worse the distortion of a signal is. But the unbalanced impedance of the electrode stuck on the hi-temporal is reduced. Also, the longer the time-constance is, the less the distortion of it signal is. But it is sensitive to the change of base line according to the unbalanced impedance. In order to solve these problems, an DC-Amplifier, the distortion of the eyeball signal is globally used. By solving unbalanced impedance problem of EOG amplifier, the distortion ratio of EOG amplifier is improved.

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Case Report: Miller Fisher Syndrome (한방치료로 호전된 Miller Fisher 증후군 환자 증례보고)

  • Ryu, Ju-young;Lee, Kang-wook;Cho, Min-kyoung;Cho, Hyun-kyoung;Yoo, Ho-ryong;Seol, In-chan;Kim, Yoon-sik
    • The Journal of Internal Korean Medicine
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    • v.37 no.4
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    • pp.661-668
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    • 2016
  • Objectives: To describe the effect of traditional Korean medicine and treatment on Miller Fisher syndrome (MFS).Methods: A 54-year-old woman diagnosed with MFS presented with eyeball dysfunction, diplopia, vertigo, right facial palsy, and back dysesthesia. The patient had been treated with immunoglobulin for 21 d, but her symptoms failed to improve. Thus, herbal medicine, acupuncture, electropuncture, pharmacopuncture, and moxibustion were added. Length of eyeball movement, distance that the patient recognize double images in the eyes and Visual Analogue Scale (VAS) are measures for the syndrome.Results: The symptoms of the patient considerably improved, with the return of eyeball movement to normal and disappearance of diplopia.Conclusions: The results suggest that Korean medicine may be an effective therapy for MFS.

Effect of EEG Wave Type of Visual Cortex on Conjugate Movement of Eyeball according to Movement of Visual Target (시 표적의 이동에 따른 안구의 동향운동이 대뇌 시피질의 뇌파에 미치는 영향)

  • Kim, Douk Hoon
    • Journal of Korean Ophthalmic Optics Society
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    • v.7 no.1
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    • pp.51-55
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    • 2002
  • This study was to investigate the effect of EEG wave type of visual cortex on conjugate movement of eyeball according to movement of visual target. Visual evoked potential(VEP) system used the Bio-Pag(production in USA) and recorded to 586 computer. The illumination of test room was 50lux and the visual target was red light dot of 3cm size. The results of dextroversion and levoversion as follows : The visual stimulation waves on the visual cortex have about 71% of delta wave, about 12% of beta wave, about 9% theta wave and about 6% of alpha wave respectively. The dextroversion and levoversion state was similar results on the histogram amplitude of EEG wave, frequency of EEG wave type, EEG wave style and phase diagram of amplitude. Expecially the histogram amplitude of EEG wave appeared almost the Gaussian shape and the phase analysis of amplitude of EEG wave was nearly linear shape. On the fast fourier transform of the amplitude and Hz, the frequency was almost low frequency under 20 Hz, and the dextroversion and levoversion shape was similar results.

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Eye Movements Produced by the Inferior Oblique Muscle in the Rabbits (가토(家兎)에 있어서 하사근(下斜筋)의 작용(作用)으로 초래(招來)되는 안구운동(眼球運動))

  • Kim, Jae-Hyub
    • The Korean journal of physiology & pharmacology
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    • v.11 no.2
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    • pp.73-78
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    • 1977
  • In urethane anaesthetized rabbits, reflex contraction of the inferior oblique muscle of a unilateral rye was evoked by the stimulation of a relevant vestibular canal nerve. Eye movement evoked by the inferior oblique muscle contracion was carefully observed with naked eyes, and recorded by means of the electrooculographic and electronystagmographic methods. The following results were obtained. 1) Contraction of the inferior oblique muscle evoked by a canal nerve excitation produced excycloduction of the eyeball associated with depression (downward rotation) instead of elevation. 2) Such depression of the eyeball was demonstrated even after the resection of the inferior oblique muscle. These experimental evidences indicate that tile rotatory action (secondary action of the muscle) of the inferior oblique muscle in the rabbits is apparently different in its direction from those already reported in the binocular animals such as cat, dog and monkey.

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A Case Report of Oculomotor Nerve Palsy Patient Treated by Traditional Korean Medicine (한방치료 후 호전된 동안신경마비 1례에 대한 증례보고)

  • Chung, Soon Hyun;Cho, Chong Kwan;Ji, Young Seung;Kim, Hyun Ji;Kim, Young Il
    • Journal of Haehwa Medicine
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    • v.23 no.2
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    • pp.45-52
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    • 2015
  • Object : This study is designed to confirm the effect of Traditional korean Medicine on oculomotor nerve palsy patient. Method : We treated with acupuncture therapy, electro-acupuncture therapy, herbal therapy, physical therapy, moxibustion therapy. And we evaluated a patient's eyelid ptosis, eyelid levator function, eyeball movement, eyeball pain. Result : After Traditional korean Medical treatment, ptosis and pain caused by ophthalmoplegia were improved. Conclusion : This study shows Traditional korean Medicine has a good effect on oculomotor nerve palsy.

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