Diplopia

Strabismus A camera lens focuses patterns of light onto film which records the image exactly. If the lens is out of focus or partially covered, a b lurry or obscured picture will result. The film is a recording device, it does not interpret and select what it portrays. Images from a camera are objective in a very literal sense. Seeing, however, is not such a seamless process. Our eyes work similarly to a camera in that they have a lens which focuses a real image on our retina, a light sensitive

Benign Essential Blepharospasm, Adult Benign essential blepharospasm (BEB) is a nervous system condition that makes a person close his or her eyes without meaning to. The blinking may gradually become more frequent and forceful, and eventually involve both eyes. This can make it hard for you to keep your eyes open and do activities such as watching television or reading. Without treatment, the eyes may close forcefully for long periods of time. CAUSES The exact cause of BEB is not known. BEB

vi. Binocular Single Vision and Diplopia Binocular single vision is achieved when an object from same position in space stimulates corresponding points on the retina. This simultaneous stimulation of corresponding retinal points results in the perception of viewing a single object with the two eyes. In someone with normal retinal correspondence, diplopia occurs when an object being viewed stimulates non-corresponding parts of the retina. This results in the perception of two, disparate objects

Introduction to Service User This 64-year-old male patient presented to the hospital with a four-day history of diplopia, dizziness and an unsteady gait. It was concluded that he had a left thalamic infarct. This resulted in right upper and lower limb weakness, difficulties with coordination and vision problems. This was the second stroke for John (pseudonym) as he was incompliant with taking his medications because they were not organic. Aside from his stroke, John was having problems voiding urine

separate extraocular muscles, they are normally examined together due to their close functional interrelationships. • Look Similar to other cranial nerve examination, start with inspection of the eyes. Look at - The position of the head position: If diplopia is present, the head turned or tilted to minimize double vision. - Inspect for ptosis and eye position. - Ask the child to look at an object about five feet away. Examine the pupils for size, shape, and symmetry. Oculomotor nerve palsy causes

Chordomas are considered rare neoplasms with an incidence of 0.08/100 000.(1) chordomas arise from remnant notochord cells found mainly within the clivus and sacrococcygeal regions . But also, can be found at any site along the vertebral column (2). The presentation of clival chordomas tend to be late, associated neurological impairment due to involvement of the lower cranial nerves (3). Clival chordomas are also challenging to treat due to their site , anterior to the brainstem, and their aggressive

Acquired third nerve palsy evaluation depends on the Signs and symptoms which is depend on the location of lesion in nerve track and according to location of the lesion can cause complete or partial paralysis . Also the evaluation depend on patient’s age because the third nerve palsy is most frequent in peoples older than 60 years and in those with prominent or long-standing risk factors, such as Systemic diseases that may be cause lesion in nerve track or even in midbrain such as diabetes mellitus

Patient History The patient history includes a review of both the ocular and systemic status of the patient: • The Quality of the patient’s vision - including symptoms such as blurred, distorted, or fluctuating vision, diplopia, night vision problems and flashes or floaters. • Ocular history - including previous ocular trauma, disease or surgery that might contribute to ocular complications associated with diabetes. • Medical history - including obesity, pregnancy, and current medication taken

Initial evaluation is directed at excluding neurological impairment or the presence of signs and symptoms consistent with orbital fracture. These include gross bony deformity, diplopia and malposition of globe. The majority of pationts who sustain orbital fractures are able to return to sport, however, persistent diplopia is not uncommon. Orbital fractures represent a significant sequelae of blunt ocular trauma sustained during sport. These injuries may result in chronic functional disability for

stereopsis. Furthermore, if an object is located at a greater distance in front of or behind the horopter line in the outside of panum’s fusional area, then the images can no longer be merged together. In this case double vision or diplopia is produced known as physiological diplopia. However, the human brain can unconsciously distinguish whether the images are coming from the same objects or not. Then, based on the position of the images on the two retinas, the visual cortex interprets the position of the