Publications by authors named "Ryunosuke Nagashima"

Article Synopsis
  • The study examined how flicker electroretinogram (ERG) amplitudes changed in 20 patients after combined cataract surgery and vitrectomy for idiopathic epiretinal membrane (ERM).
  • Significant increases in flicker ERG amplitudes were observed 1 week post-surgery, but these levels gradually declined, returning to baseline by 6 months.
  • Additionally, central macular thickness (CMT) decreased significantly after the surgery, indicating that early functioning assessments may help predict the long-term outcomes of the ERM treatment.
View Article and Find Full Text PDF

Purpose: To report our findings of reduced full-field electroretinograms (ff-ERGs) and abnormal optical coherence tomographic (OCT) images in a patient with poor visual acuity after cataract surgery who was eventually diagnosed with vitamin A deficiency (VAD).

Methods: This was a clinical study of a patient who complained of blurred vision after cataract surgery. To determine the cause of the reduced vision, we recorded full-field electroretinograms (ff-ERGs) to determine the scotopic and photopic status of the retina.

View Article and Find Full Text PDF

Intraocular inflammations (IOIs) have been reported to occur after intravitreal injections of brolucizumab, and one of their causes has been suggested to be drug-specific features. We evaluated the anterior chamber by the aqueous flare value (AFV) and the retina by flicker electroretinography (ERG) after the initial intravitreal injection of aflibercept (IVA), brolucizumab (IVBr), or faricimab (IVF) for neovascular age-related macular degeneration (nAMD). The AFV and flicker ERGs were determined before, 2 weeks after, and 4 weeks after the injections in 14 eyes of 14 patients for each drug.

View Article and Find Full Text PDF

Purpose: To determine the characteristics and cause of the increase in the amplitude of flicker electroretinography (ERG) after cataract surgery.

Design: Prospective, observational clinical study.

Participants: Thirty patients who underwent cataract surgery.

View Article and Find Full Text PDF

Purpose: To report abnormal full-field electroretinograms (ERGs) in a patient with cystoid macular edema (CME) induced by systemic paclitaxel.

Methods: This is an observational case report. Full-field ERGs were recorded to evaluate the retinal function using the RETeval system and conventional ERGs using contact lens electrodes with built-in white light-emitting diodes.

View Article and Find Full Text PDF

Background: A new handheld electroretinographic (ERG) recording system can record ERGs without mydriasis. However, this RETeval system cannot record ERGs from both eyes simultaneously. Thus, the purpose of this study was to determine whether the sequence of the ERG recordings will alter the results.

View Article and Find Full Text PDF

Purpose: To determine whether there is a significant correlation between the amplitude of the photopic negative response (PhNR) and the peripapillary retinal nerve fiber layer thickness (pRNFLT) in eyes of young, healthy subjects.

Methods: We analyzed 136 eyes of 136 young, healthy subjects (89 males and 47 females; age, 20-29 years). The PhNRs were recorded with the RET system without mydriasis using red flashes on a blue background.

View Article and Find Full Text PDF

Purpose: To report our findings in a case of lens fragment-induced uveitis associated with supernormal flicker electroretinograms (ERGs) twenty months after the cataract surgery.

Methods: This is an observational case report. Full-field flicker ERGs were recorded with the RETeval system.

View Article and Find Full Text PDF

Purpose: To investigate clinical characteristics of RDH5-related fundus albipunctatus (FAP) in a Japanese cohort.

Methods: Twenty-five patients from 22 pedigrees with RDH5-related FAP were studied. Ophthalmic medical records were reviewed.

View Article and Find Full Text PDF

Purpose: A small, full-field flicker electroretinogram (ERG) recording system was recently developed to record flicker ERGs without mydriasis (RETeval). The device delivers a stimulus with constant retinal illuminance by adjusting the retinal luminance to compensate for changes in the pupillary area. The purpose of this study was to determine what factors affect the fundamental components of the flicker ERGs recorded by RETeval in young healthy subjects.

View Article and Find Full Text PDF