Yannuzzi retina atlas free download
On light-adapted 30 Hz flicker ERG 30 Hz amplitudes were attenuated in both eyes. Light-adapted 3.0 ERG (cone response) revealed reduced a- and b-wave amplitudes. On dark-adapted 3.0 ERG, both a- and b-wave implicit times were prolonged in both eyes, and a-wave and b-wave amplitudes were reduced in both eyes. Electroretinogram (ERG) and visual evoked potential (VEP) revealed that the patient’s b-wave amplitude on dark-adapted 0.01 ERG (rod response) was below the normal limit in both eyes. Central macular thickness was about 58 μm and central choroidal thickness was about 118 μm for both eyes. Atrophy of the choriocapillaris and outer retinal layer were detected in OCT ( Figure 3). FAF imaging showed clearly defined hypoautofluorescent areas that corresponded to the aforementioned lesions ( Figure 2). On fluorescein angiography, large choroidal vessels were easily observed beneath these affected regions due to loss of the pigment epithelium and choriocapillaris ( Figure 1C, D). No flecks or drusen were observed ( Figure 1A, B). Fundoscopic examination showed bilateral symmetrical RPE and choriocapillaris atrophy in the posterior polar areas between the vascular arcades and around the optic nerve. Slit-lamp examination was normal in both eyes and intraocular pressure was 15 mmHg in the right eye, 16 mmHg in the left eye. Best corrected visual acuity was 0.3 in his right and 0.2 in his left eye with Snellen testing. He denied any family history of similar ocular disorders. We aimed to present the results of fluorescein angiography, fundus autofluorescence imaging, optical coherence tomography, and electrophysiological tests in this rare case of posterior polar central choroidal dystrophy.Ī 52-year-old male patient had a 25-year history of decreasing vision in both eyes. The patient was diagnosed with posterior polar central choroidal dystrophy. Photopic and scotopic responses were subnormal in flash electroretinogram (ERG), and responses were also minimal in pattern ERG and multifocal ERG. Atrophy of the choriocapillaris and outer retinal layer were detected in optical coherence tomography. Fundus autofluorescence imaging showed clearly defined hypoautofluorescent areas that corresponded to the aforementioned lesions. On fluorescein angiography, the large choroidal vessels beneath these affected regions were easily seen.
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Fundoscopic examination showed bilateral symmetric atrophy of the retinal pigment epithelium and choriocapillaris in the posterior polar areas between vascular arcades and surrounding the optic disc.
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Best corrected visual acuity was 0.3 in his right and 0.2 in his left eye. A 52-year-old male presented with a 25-year history of decreasing vision.