Electronegative ERG or pseudo-negative ERG?
(Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - September 23, 2022 Category: Opthalmology Source Type: research

Residual rod function in CNGB1 mutant dogs
ConclusionsCNGB1 mutant dogs have a residual ERG response from desensitized rods. This may be due to low levels of CNGA1 in outer segments. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - September 15, 2022 Category: Opthalmology Source Type: research

Fullfield and extrafoveal visual evoked potentials in healthy eyes: reference data for a curved OLED display
ConclusionsA curved OLED visual stimulator is well suited to obtain VEP response curves with a reasonable interindividual variability. We found significant effects of age and gender in our responses but no effect of the lens status. EF-P-ON/OFF-VEP tends to show smaller amplitudes. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - September 10, 2022 Category: Opthalmology Source Type: research

Two cases of unilateral cone –rod dysfunction presenting in adult females
ConclusionThese two cases add to the literature of case reports of unilateral cone –rod and rod-cone dystrophies. However, the underlying etiology of the unilateral pattern of cone–rod dysfunction and the significance of the heterozygous mutations found in both cases remains uncertain. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - September 7, 2022 Category: Opthalmology Source Type: research

Current usage of electrophysiological tests in a secondary referral hospital in Korea
ConclusionElectrophysiological tests are used to objectively evaluate visual function or discriminate diseases of unknown causes and are used in various departments. Electrophysiology testing is expected to be an additional test to assess visual function. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - August 25, 2022 Category: Opthalmology Source Type: research

Correction to: Electroretinogram responses in myopia: a review
(Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - August 18, 2022 Category: Opthalmology Source Type: research

A clinical and electrophysiological case study of a child with a novel frame shift mutation in the CACNA1F and missense variation of RIMS1 genes
ConclusionsThe importance of recording ERGs as part of evaluating infants who present with nystagmus, even with a normal fundus appearance, is supported. Further, sERGs were able to distinguish an apparent variant of CSNB2 and could give consistent results over many years. FVEP results add to the evidence that albinoid misrouting of the optic nerves may occur in cases of CSNB2. ERGs and fVEPs can provide valuable information in discriminating the relative diagnostic importance of multiple genetic abnormalities. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - August 10, 2022 Category: Opthalmology Source Type: research

Structural and functional changes among diabetics with no diabetic retinopathy and mild non-proliferative diabetic retinopathy using swept-source optical coherence tomography angiography and photopic negative response
ConclusionA significant decrease in functional changes as measured by ERG especially PhNR, is seen even among the NDR group compared to controls unlike SSOCTA parameters that measures very early vascular structural changes. PhNR is a sensitive test to identify early preclinical changes in DR when microvascular structural changes as determined by SSOCTA are normal. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - July 28, 2022 Category: Opthalmology Source Type: research

Documentation of recovery from vitamin A deficiency-related retinopathy via multimodal imaging and electroretinogram testing
ConclusionThis report documents an example of vitamin A deficiency in the developed world. We aim to provide a comprehensive description of clinical examination and multimodal imaging findings before and after vitamin supplementation for vitamin A deficiency. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - July 28, 2022 Category: Opthalmology Source Type: research

Abstracts of the 59th Symposium of the International Society for Clinical Electrophysiology of Vision (ISCEV): Liverpool, 3 –6 August, 2022
(Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - July 27, 2022 Category: Opthalmology Source Type: research

Use of an alternating current amplifier when recording the ERG c-wave to evaluate the function of retinal pigment epithelial cells in rats
ConclusionsThe c-wave was easily detectable using an AC amplifier with the low-cut filter set at 0.01  Hz. Using the AC amplifier may allow easier c-wave recording, compared with the conventional use of a direct current (DC) amplifier, and could be useful for evaluating RPE function. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - July 27, 2022 Category: Opthalmology Source Type: research

Evaluation of the visual system with visual evoked potential and optical coherence tomography in patients with idiopathic Parkinson's disease and with  multiple system atrophy
ConclusionsThe present study compared pVEP and OCT parameters in PD and MSA groups. It was concluded that pVEP and OCT examinations were of importance in that they were easily accessible, affordable, noninvasive biomarkers that might be used in early periods and progression of the disease and in follow-up. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - July 26, 2022 Category: Opthalmology Source Type: research

ISCEV 2022 Symposium Author Index
(Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - July 19, 2022 Category: Opthalmology Source Type: research

The 59th annual ISCEV symposium Liverpool, United Kingdom, 3rd –6th August 2022
(Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - July 11, 2022 Category: Opthalmology Source Type: research

Comparison of CRT and LCD monitors for objective estimation of visual acuity using the sweep VEP
ConclusionsBased on the results of this study, LCD monitors may substitute CRT monitors for presenting the stimuli for the sweep VEP to objectively estimate visual acuity. Nevertheless, it is advisable to perform a calibration and to collect normative data of healthy volunteers using best-corrected and artificially reduced visual acuity for establishing a conversion formula between sweep VEP outcome and the subjective visual acuity before replacing a CRT with an LCD stimulator. (Source: Documenta Ophthalmologica)
Source: Documenta Ophthalmologica - July 5, 2022 Category: Opthalmology Source Type: research