Rod-Driven Focal Macular Electroretinogram

Choshi, Toshiharu; Matsumoto, Celso Soiti; Nakatsuka, Kazuo

doi:10.1016/s0021-5155(03)00073-x

Cited by 7 publications

(8 citation statements)

References 12 publications

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“…m −2 . s −1 ), which is too dim to elicit a scattered light response from the periphery (Horiguchi et al ., 1991; Horiguchi and Miyaki, 1992; Chosi et al ., 2003). The reported mean amplitude of the b‐wave of the focal rod response recorded with this technique is 1.12 μ V, after averaging 200–400 responses.…”

Section: Discussionmentioning

confidence: 99%

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Development of a technique for recording the focal rod ERG

Binns

Margrain

2005

Ophthalmic Physiologic Optic

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The scotopic ERG recorded in response to a focal stimulus has a double b-wave. The first wave results from direct focal stimulation of the retina, and the second originates in the peripheral retina in response to scattered light. The aim of this study was to assess two possible protocols for the isolation of the focal rod response, namely 'Subtraction' and 'Background Adaptation' techniques. The Subtraction technique involved the recording of a full-field response, which matched the b-wave elicited by intraocular light scatter, and the subtraction of this full-field response from the initial trace to isolate the focal component. In the Background Adaptation technique an adapting surround was used to suppress the response from the peripheral retina. Focal rod responses were isolated with both techniques. However, the Background Adaptation technique was found to more reliably elicit a focal response with a measurable a-wave, and was also considerably less time consuming than the Subtraction technique.

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Section: Discussionmentioning

confidence: 99%

“…m −2 . s −1 , indicating that the effect of scattered light is minimal in these conditions (Horiguchi et al ., 1991; Horiguchi and Miyaki, 1992; Chosi et al ., 2003). Horiguchi et al .…”

Section: Introductionmentioning

confidence: 99%

Development of a technique for recording the focal rod ERG

Binns

Margrain

2005

Ophthalmic Physiologic Optic

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“…Another technique used to record focal rod responses is the use of double-flashes to stimulate a 40 degree area that can isolate focal rod a-waves (Nusinowitz et al, 1995) or by using a small blue light (λ max = 470 nm) stimuli after dark-adaptation. (Choshi et al, 2003) Thus far, the clinical use of each technique to record scotopic responses from a focal area is limited.…”

Section: Focal Rod Ergsmentioning

confidence: 99%

“…(Miyake 1998 Their recording system for fmERGs was based on a fundus camera into which a focal stimulus system was integrated. Another system to record fmERGs was developed by Matsumoto et al (Choshi et al, 2003;Yamada et al, 2006) Their system is based on a slit-lamp microscope, and both the focal stimulus and fundus observation systems were integrated into the slit-lamp. With both systems, the examiner records the ERGs while monitoring the stimulus on the fundus either by an infrared television fundus camera or a slit-lamp-mounted infrared CCD camera.…”

mentioning

confidence: 99%

Objective Assessment of Local Retinal Function by Focal Macular and Multifocal Electroretinograms

Shinoda¹,

Matsumoto²,

Ohde³

2011

Electroretinograms

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“…The focal response was calculated by subtracting the scattered light response from the original double peaked ERG b-wave response. Other methods used for recording a focal rod-ERG include suppressing the peripheral rods using a dim background, or using a using a very small five degree dim stimulus that produced no recordable scattered light component (Binns, & Margrain 2006;Choshi et al, 2003;Hood et al, 1998). While rod-isolated focal ERG responses can be obtained by these methods, the b-wave responses recorded are extremely small (<10 μV).…”

Section: Introductionmentioning

confidence: 99%