11/127. Multichannel cochlear implantation in visually impaired patients.OBJECTIVE: To evaluate the outcome of cochlear implantation in patients with severe to profound hearing loss and visual impairment. STUDY DESIGN: Retrospective case review. SETTING: Tertiary referral center with a large cochlear implant program. patients: Six adults and two children with severe or profound hearing loss and significant visual impairment underwent multichannel cochlear implantation. Follow-up period ranged from 6 months to 9 years. Case history, etiology of visual and hearing loss, and benefit from cochlear implant were evaluated. INTERVENTIONS: cochlear implantation and subsequent rehabilitation. MAIN OUTCOME MEASURES: speech perception measures were selected based on the patient age and cognitive abilities. Identical measures were used in each patient before and after implantation. RESULTS: As a group, patients did well after cochlear implantation. There was significant improvement in speech perception when compared with the score before implantation. CONCLUSIONS: cochlear implants can play a significant rehabilitative role in patients with severe visual and auditory impairment. Additional skills are required by the implant team for rehabilitation of patients with multiple sensory deficits.- - - - - - - - - - ranking = 1keywords = perception, speech (Clic here for more details about this article) |
12/127. Fulminant orbital cellulitis with complete loss of vision.Bacterial orbital cellulitis is a condition that rarely presents with complete loss of vision. A case is reported of a 69-year-old man who presented with fulminant onset of proptosis, significant ophthalmoplegia and no perception of light. Computed tomography showed no evidence of paranasal sinus disease. Despite treatment with intravenous flucloxacillin, ceftriaxone and metronidazole, and later, penicillin after streptococcus pyogenes was grown from tissue culture, there was no improvement in vision; however ocular motility returned to normal.- - - - - - - - - - ranking = 0.49909190616603keywords = perception (Clic here for more details about this article) |
13/127. Post-traumatic scedosporium inflatum endophthalmitis.This is the first documented case of post-traumatic scedosporium inflatum endophthalmitis and only the second of S. inflatum endophthalmitis occurring in a non-immunocompromised individual, to the authors' knowledge. A case is reported of a 57-year-old woman who, while chopping wood, had a wood chip hit her in the right eye. This caused a penetrating corneal injury with uveal prolapse and damage to the crystalline lens. There were also vitreous and suprachoroidal haemorrhages. No detectable intraocular foreign material was retained. The clinical manifestation of infection was delayed, but once established, it was very destructive. The initially indolent endophthalmitis eventually led to loss of all light perception and panophthalmitis which required enucleation. The responsible strain of S. inflatum was found to be resistant to all antifungal medication in vitro.- - - - - - - - - - ranking = 0.49909190616603keywords = perception (Clic here for more details about this article) |
14/127. Temporary blindness after cosmetic blepharoplasty.A patient who underwent a cosmetic blepharoplasty suffered a retrobulbar hemorrhage with no light perception deception detected when the dressing was removed two hours postoperatively. Opening the incision site led to the complete return of visual acuity and ocular motility and relief of the proptosis. The rebleeding of cauterized blood vessels may have caused the retrobulbar hemorrhage and seems to be a potential problem in all cosmetic blepharoplasties. Eliminating the use of postoperative bandages may prevent blindness after cosmetic blepharoplasty since it allows early detection of a retrobulbar hemmorrhage. This allows the nurse to check the patient for loss of vision and proptosis at ten-minute intervals for the first two hours after surgery so immediate treatment can be implemented if retrobulbar hemorrhage and central retinal artery occlusion occur.- - - - - - - - - - ranking = 0.49909190616603keywords = perception (Clic here for more details about this article) |
15/127. Bilateral optic disk edema and blindness as initial presentation of acute lymphocytic leukemia.PURPOSE: To report bilateral optic disk edema and blindness as the unusual initial presentation of acute lymphocytic leukemia (ALL) in an adult. methods: A 19-year-old man presented with a history of headaches, back pain, and 10 days of worsening vision that progressed to blindness. Ocular examination revealed light perception acuity in the right eye and no light perception in the left eye. Fundus examination revealed bilateral profound optic disk edema, tortuous vessels, and retinal hemorrhages. Acute lymphocytic leukemia was diagnosed with complete blood count and bone marrow biopsy. Head computed tomography and magnetic resonance imaging, were normal. Lumbar puncture revealed normal opening pressure. Ocular ultrasonography showed bilateral optic nerve enlargement. DESIGN: Interventional case report and literature review. ESULTS: The presumptive diagnosis of leukemic infiltration of the optic nerves was made, and urgent radiotherapy, intrathecal methotrexate, and intravenous daunorubicin were instituted. visual acuity improved to hand motions in the right eye. CONCLUSIONS: Acute lymphocytic leukemia can rarely present in adults as visual changes due to leukemic optic nerve infiltration. radiation treatment should be considered as an urgent treatment modality for this rare condition.- - - - - - - - - - ranking = 0.99818381233206keywords = perception (Clic here for more details about this article) |
16/127. Loss of vision caused by expansion of intraocular perfluoropropane (C(3)F(8)) gas during nitrous oxide anesthesia.PURPOSE: To report visual loss associated with nitrous oxide anesthesia in patients with intraocular perfluoropropane (C(3)F(8)) gas. DESIGN: Observational case series. methods: Three patients are described who lost vision in the eye with intraocular gas after subsequent nitrous oxide general anesthesia. RESULTS: Three patients, aged 75, 80, and 73 years, with intraocular C(3)F(8) gas in three eyes underwent nitrous oxide general anesthesia in three different medical centers for conditions unrelated to their ophthalmic surgery, ranging from 10 days to 1 month after their vitreoretinal procedure. All three patients suffered visual loss due to presumed central retinal artery occlusion caused by expansion of the intraocular gas by nitrous oxide during general anesthesia. In two patients, there was no recovery of light perception. In one patient, there was moderate recovery of vision. CONCLUSIONS: Identification of patients with intraocular gas is critical when planning nitrous oxide anesthesia. This may be achieved by the use of a simple intraocular gas identification bracelet issued to patients at the time of their vitreoretinal procedure.- - - - - - - - - - ranking = 0.49909190616603keywords = perception (Clic here for more details about this article) |
17/127. Blindsight modulation of motion perception.Monkey data suggest that of all perceptual abilities, motion perception is the most likely to survive striate damage. The results of studies on motion blindsight in humans, though, are mixed. We used an indirect strategy to examine how responses to visible stimuli were modulated by blind-field stimuli. In a 26-year-old man with focal striate lesions, discrimination of visible optic flow was enhanced about 7% by blind-field flow, even though discrimination of optic flow in the blind field alone (the direct strategy) was at chance. Pursuit of an imagined target using peripheral cues showed reduced variance but not increased gain with blind-field cues. Preceding blind-field prompts shortened reaction times to visible targets by about 10 msec, but there was no attentional crowding of visible stimuli by blind-field distractors. A similar efficacy of indirect blind-field optic flow modulation was found in a second patient with residual vision after focal striate damage, but not in a third with more extensive medial occipito-temporal damage. We conclude that indirect modulatory strategies are more effective than direct forced-choice methods at revealing residual motion perception after focal striate lesions.- - - - - - - - - - ranking = 3.1304005466788keywords = perception, discrimination (Clic here for more details about this article) |
18/127. Bilateral optic nerve infiltration in central nervous system leukemia.PURPOSE: To report the case of a 58-year-old man with sequential bilateral retrolaminar leukemic infiltration of the optic nerves who presented with normal-appearing optic nerves and no optic nerve enhancement. DESIGN: Interventional case report. methods: A 58-year-old man with chronic myelogenous leukemia (CML) developed progressive vision loss to no light perception in both eyes over four days. The patient received 14 doses of external beam irradiation and 10 cycles of intrathecal cytarabine. Despite treatment, he developed optic nerve pallor, and visual acuity remained no light perception in both eyes. CONCLUSIONS: In a patient with leukemia, leukemic optic nerve infiltration may occur even with normal-appearing optic nerves and a normal magnetic resonance image. It is important to maintain a high clinical suspicion for optic nerve infiltration so that prompt local irradiation may be initiated.- - - - - - - - - - ranking = 0.99818381233206keywords = perception (Clic here for more details about this article) |
19/127. Ipsilateral globe penetration and transient contralateral amaurosis following retrobulbar anesthesia.PURPOSE: To report a rare complication of retrobulbar anesthesia with ipsilateral globe penetration and transient contralateral amaurosis. DESIGN: Interventional case report. methods: A 63-year-old woman complained of vision loss in the right eye immediately following cataract surgery on the left eye. RESULTS: Right eye vision decreased to no light perception with clear media and normal fundus. The vision recovered to baseline in 12 hours. Left eye vision was checked and demonstrated only light perception. Fundus examination disclosed preretinal and vitreous hemorrhage. During vitrectomy of the left eye, a penetrating wound below the optic disk with retinal detachment was found. CONCLUSION: The ipsilateral globe penetration wound depicts the mechanism of contralateral amaurosis following retrobulbar anesthesia of the case.- - - - - - - - - - ranking = 0.99818381233206keywords = perception (Clic here for more details about this article) |
20/127. Postoperative reversal of complete (monocular) blindness in skull base meningioma: case report.BACKGROUND: Meningiomas of the anterior cranial fossa frequently present with impaired visual function. Recognition of this entity in the differential diagnosis of painless, progressive, and asymmetric optic neuropathy is important since reversal of visual loss is possible given timely surgical excision of the tumour. methods: A 76-year-old man presented with no perception of light in his right eye and a reduced visual acuity of 20/60 in his left eye with a markedly constricted visual field. His visual deterioration had progressed over the previous three months and was not associated with headache. ophthalmoscopy showed normal optic discs. MRI scanning showed a large frontal basal meningioma, which was subsequently resected. RESULTS: The patient noticed an immediate improvement in his vision in his right eye. visual acuity in his right eye improved to 20/50 at six weeks postoperatively and to 20/25 at five months, with corresponding improvement of the visual field. CONCLUSION: Complete monocular blindness due to tumour compressing or distorting the anterior visual pathways does not preclude recovery following timely decompressive surgery, especially when the appearance of the optic disc is normal.- - - - - - - - - - ranking = 0.49909190616603keywords = perception (Clic here for more details about this article) |
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