Humans ; Vision Disorders/etiology* ; Visual Acuity

Adolescent ; Humans ; Male ; Migraine Disorders ; complications ; Syndrome ; Vision Disorders ; etiology

Dengue/therapy* ; Humans ; Platelet Transfusion ; Vision Disorders/etiology*

PURPOSE: The authors hereby describe a case of Wernicke-Korsakoff syndrome with accompanying ocular findings that is caused by hyperernesis gravidarum. METHODS: We experienced a 27-year-old female at 12 weeks of pregnancy, who visited our clinic because of weight loss, gait disturbance, decreased mentality and dizziness after prolonged vomiting for 2 months. Neurological examination demonstrated ataxia of gait and loss of orientation. Ophthalmologic examination showed decreased visual acuity, upbeat nystagmus, diplopia and retinal hemorrhage. RESULTS: We report a relatively rare case of Wernicke-Korsakoff syndrome with ophthalmic symptoms induced by hyperemesis gravidarum. CONCLUSIONS: If a pregnant women has symptoms of severe vomiting along with other ocular findings such as retinal hemorrhage or restricted extraocular movement, one must suspect the diagnosis of Wernicke-Korsakoff syndrome, and should start appropriate treatment immediately.
Vision Disorders/*etiology ; *Pregnancy Complications ; Pregnancy ; Korsakoff Syndrome/*etiology/*physiopathology ; *Hyperemesis Gravidarum ; Humans ; Female ; Eye Diseases/*etiology ; Adult

PURPOSE: We report a case of branch retinal artery occlusion (BRAO) in a healthy pregnant woman. METHODS: A 29-year-old pregnant woman presented with decreased vision in her left eye. She had a pale retina with macular edema consistent with BRAO. An extensive workup was performed to determine an etiologic factor. All test results were within normal limits except for her factor VIII activity. Her visual acuity improved from finger counting to 20/30 over 2 months without any treatment. RESULTS: This case suggests that BRAO can occur in healthy patients without any systemic or ocular disorders. CONCLUSIONS: BRAO can occur in healthy patients without any systemic or ocular disorders, despite an extensile evaluation.
Adult ; Factor VIII/analysis ; Female ; Humans ; Macular Edema/etiology ; Pregnancy ; *Pregnancy Complications, Hematologic ; Retinal Artery Occlusion/*etiology ; Vision Disorders/etiology

PURPOSE: We report a case of branch retinal artery occlusion (BRAO) in a healthy pregnant woman. METHODS: A 29-year-old pregnant woman presented with decreased vision in her left eye. She had a pale retina with macular edema consistent with BRAO. An extensive workup was performed to determine an etiologic factor. All test results were within normal limits except for her factor VIII activity. Her visual acuity improved from finger counting to 20/30 over 2 months without any treatment. RESULTS: This case suggests that BRAO can occur in healthy patients without any systemic or ocular disorders. CONCLUSIONS: BRAO can occur in healthy patients without any systemic or ocular disorders, despite an extensile evaluation.
Adult ; Factor VIII/analysis ; Female ; Humans ; Macular Edema/etiology ; Pregnancy ; *Pregnancy Complications, Hematologic ; Retinal Artery Occlusion/*etiology ; Vision Disorders/etiology

OBJECTIVES: To study the quantitative and qualitative differences of visual evoked potential (VEP) in monocular visual impairment after different parts of visual pathway injury. METHODS: A total of 91 subjects with monocular visual impairment caused by trauma were selected and divided into intraocular refractive media-injury group (eyeball injury group for short), optic nerve injury group, central nervous system injury and intracranial combined injury group according to the injury cause and anatomical segment. Pattern Reversal visual evoked potential (PR-VEP) P100 peak time and amplitude, Flash visual evoked potential (F-VEP) P2 peak time and amplitude were recorded respectively. SPSS 26.0 software was used to analyze the differences of quantitative (peak time and amplitude) and qualitative indexes (spatial frequency sweep-VEP acuity threshold, and abnormal waveform category and frequency) of the four groups. RESULTS: Compared with healthy eyes, the PR-VEP P100 waveforms of the intraocular eyeball injury group and the F-VEP P2 waveforms of the optic nerve group showed significant differences in prolonged peak time and decreased amplitude in injured eyes (P<0.05). The PR-VEP amplitudes of healthy eyes were lower than those of injured eyes at multiple spatial frequencies in central nervous system injury group and intracranial combined injury group (P<0.05).The amplitude of PR-VEP in patients with visual impairment involving central injury was lower than that in patients with eye injury at multiple spatial frequencies. The frequency of VEP P waveforms reaching the threshold of the intraocular injury group and the optic nerve injury group were siginificantly different from the intracranial combined injury group, respectively(P<0.008 3), and the frequency of abnormal reduction of VEP amplitude of threshold were significantly different from the central nervous system injury group, respectively(P<0.008 3). CONCLUSIONS VEP can distinguish central injury from peripheral injury, eyeball injury from nerve injury in peripheral injury, but cannot distinguish simple intracranial injury from complex injury, which provides basic data and basis for further research on the location of visual impairment injury.
Evoked Potentials, Visual ; Eye ; Humans ; Optic Nerve ; Optic Nerve Injuries ; Vision Disorders/etiology*

INTRODUCTIONThe aim of the study was to compare the visual performance of LASIK eyes measured using high-contrast logMAR letter charts under bright (photopic) and dim (mesopic) conditions.

MATERIALS AND METHODSA total of 46 subjects (35 +/- 8 years of age) undergoing LASIK procedures were recruited for the study. The best spectacle-corrected visual acuity (BSCVA) of each subject was measured using the high-contrast ETDRS logMAR chart under photopic and mesopic conditions at 3 visits: preoperative (Pre), 1 month postoperative (Post1) and 3 months postoperative (Post3). The differences in logMAR scores for the right eyes only were analysed for the Pre-Post1 (n = 46), Pre-Post3 (n = 18) and Post1-Post3 (n = 16) comparisons.

RESULTSThe logMAR scores of subjects were worse at the 1-month postoperative visit than preoperatively, and improvement in visual performance was seen at the 3-month postoperative visit. These changes in visual performance became more evident under mesopic conditions. The means and standard errors of the differences in logMAR scores for the Pre-Post3 (0.097 +/- 0.020) were slightly larger than those of the Pre-Post1 (-0.067 +/- 0.019) and Post1-Post3 (0.031 +/- 0.012) comparisons. Under mesopic conditions, the visual performance of the subjects was statistically significant for the 3 comparisons, but not under photopic conditions.

CONCLUSIONHigh-contrast logMAR chart performed under mesopic conditions has the potential to replace visual acuity measured under photopic conditions in providing more reliable representation of postoperative visual outcomes of LASIK eyes. Eye doctors should consider performing this vision test routinely to gauge the success of LASIK surgery.

Adult ; Contrast Sensitivity ; Female ; Humans ; Keratomileusis, Laser In Situ ; adverse effects ; Lighting ; Male ; Middle Aged ; Reproducibility of Results ; Vision Disorders ; diagnosis ; etiology ; Vision Tests ; methods ; Visual Acuity

Retrobulbar hemorrhage and permanent visual loss are rare presentations following traumatic asphyxia. In this case, bilateral permanent visual disturbance developed in a woman after chest-crushing trauma without direct trauma to the orbits. A computed tomography scan confirmed bilateral retrobulbar hemorrhages. An ophthalmologic exam revealed bilateral subconjunctival hemorrhages and severe lid edema. Despite high-dose steroid therapy, visual recovery was limited, and optic nerve atrophy developed. Ischemia of the optic nerve associated with retrobulbar hemorrhage may be postulated as one of the causes of permanent visual impairment following traumatic asphyxia.
Asphyxia/*complications/*etiology ; Female ; Humans ; Ischemia/complications ; Middle Aged ; Optic Nerve/blood supply ; Retrobulbar Hemorrhage/*complications/*etiology/radiography ; Thoracic Injuries/*complications ; Tomography, X-Ray Computed ; Vision Disorders/*etiology

Visual loss and field defects commonly occur after acute blood loss. We present a case of bilateral permanent visual field defect in a 30-year-old man after a massive hemorrhage caused by large vessel injury during a right nephrectomy. His postoperative visual acuity decreased significantly, and his visual field showed peripheral constriction and inferior altitudinal field defect in both eyes. A year and a half after the operation, visual acuity recovered to the preoperative level, but the field did not show improvement. We advance that this is a possible result of extensive injury to the occipital area, excluding the corresponding area of the macula.
Acute Disease ; Adult ; Blindness/*etiology ; Blood Loss, Surgical/*physiopathology ; Cerebral Infarction/complications/*etiology ; Humans ; Male ; Nephrectomy ; Occipital Lobe/pathology ; Vena Cava, Inferior/injuries ; Vision Disorders/*etiology ; *Visual Fields