ABSTRACT
Dengue fever is the most prevalent flavivirus infection in tropical and subtropical areas of the world. It is transmitted by the haematophagous mosquito Aedes aegypti, and it manifests clinically as classical dengue fever, dengue haemorrhagic fever and dengue shock syndrome. Rarely, dengue can be associated with neurophthalmic manifestations. We present the case of a 21-year-old woman, suffering from dengue with an isolated abducens nerve palsy.
Subject(s)
Abducens Nerve Diseases , Aedes , Dengue , Severe Dengue , Abducens Nerve Diseases/diagnosis , Abducens Nerve Diseases/etiology , Adult , Animals , Dengue/complications , Dengue/diagnosis , Female , Humans , Severe Dengue/complications , Severe Dengue/diagnosis , Young AdultABSTRACT
This paper proposes a new electronic mobility cane (EMC) for providing obstacle detection and way-finding assistance to the visually impaired people. The main feature of this cane is that it constructs the logical map of the surrounding environment to deduce the priority information. It provides a simplified representation of the surrounding environment without causing any information overload. It conveys this priority information to the subject by using intuitive vibration, audio or voice feedback. The other novel features of the EMC are staircase detection and nonformal distance scaling scheme. It also provides information about the floor status. It consists of a low power embedded system with ultrasonic sensors and safety indicators. The EMC was subjected to series of clinical evaluations in order to verify its design and to assess its ability to assist the subjects in their daily-life mobility. Clinical evaluations were performed with 16 totally blind and four low vision subjects. All subjects walked controlled and the real-world test environments with the EMC and the traditional white cane. The evaluation results and significant scores of subjective measurements have shown the usefulness of the EMC in vision rehabilitation services.
Subject(s)
Blindness/rehabilitation , Canes , Man-Machine Systems , Self-Help Devices , Sensory Aids , Ultrasonography/instrumentation , Wireless Technology/instrumentation , Adult , Blindness/physiopathology , Electronics, Medical/instrumentation , Equipment Design , Equipment Failure Analysis , Humans , Middle Aged , Orientation , Pattern Recognition, Automated/methodsABSTRACT
A wearable assistive system is proposed to improve mobility of visually impaired people (subjects). This system has been implemented in the shape of a bracelet and waist-belt in order to increase its wearable convenience and cosmetic acceptability. A camera and an ultrasonic sensor are attached to a customized waist-belt and bracelet, respectively. The proposed modular system will act as a complementary aid along with a white cane. Its vision-enabled waist-belt module detects the path and distribution of obstacles on the path. This module conveys the required information to a subject via a mono earphone by activating relevant spoken messages. The electronic bracelet module assists the subject to verify this information and to perceive distance of obstacles along with their locations. The proposed complementary system provides an improved understanding of the surrounding environment with less cognitive and perceptual efforts as compared to a white cane alone. This system was subjected to clinical evaluations with 15 totally blind subjects. Results of usability experiments demonstrated effectiveness of the system as a mobility aid. Amongst the participated subjects, 93.33% expressed satisfaction with the information content of this system, 86.66% subjects comprehended its operational convenience, and 80% appreciated the comfort of the system.
Subject(s)
Self-Help Devices , Visually Impaired Persons , Walking , Abdomen , Canes , Electronics , Equipment Design , Humans , Patient Satisfaction , WristABSTRACT
Conjunctival melanoma is a rare ocular malignancy occurring most frequently in aged patients. It is a potentially life-threatening condition. This article presents history and management of a case of malignant melanoma of conjunctiva resembling a horn.
Subject(s)
Conjunctival Neoplasms/pathology , Melanoma/pathology , Adult , Conjunctival Neoplasms/surgery , Female , Humans , Melanoma/surgeryABSTRACT
In India, the dengue disease has attained an unprecedented proportion with a sharp increase in the size of human population at risk recently. Presentation of the disease varies from asymptomatic illness to haemorrhagic manifestations and shock. Previously ocular findings were considered rare in dengue fever; but due to increased number of cases various types of ocular complications are described in present day case series. Here, is presented a case of a girl with serologically proven dengue fever who developed a subhyaloid premacular haemorrhage in one eye with superficial retinal haemorrhages and cotton wool spots in both eyes.
