Erg Reduced Dark Adapted B Wave Amplitude C4021561
A finding on electroretinography testing showing reduced B wave amplitude in dark-adapted conditions, indicating retinal cell dysfunction. This can affect vision and may signal inherited or acquired retinal disorders. Further eye examination is needed to determine the underlying cause.
Key facts at a glance
- ICD-10
- H53.9
- ICD-11
- 9A00.0
- Body system
- ophthalmologic
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Generalized symptoms
(ophthalmologic)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Night blindness
(ophthalmologic)Reduced scotopic visual acuity
(ophthalmologic)Diminished electroretinogram b-wave amplitude
(ophthalmologic)Decreased peripheral visual field
(ophthalmologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Healthy lifestyle changes and stress management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Regular Ophthalmologic Monitoring
Periodic electroretinography testing and comprehensive eye examinations to track changes in retinal function over time.
Retinal Support Nutrition
Diet rich in antioxidants, omega-3 fatty acids, and vitamins A, C, and E to support retinal health and function.
Additional treatment options
Protective Eye Measures
Wearing UV-protective eyewear outdoors and avoiding excessive light exposure that may stress the retina.
lifestyleComprehensive Retinal Evaluation
Detailed diagnostic workup including fundoscopy, visual field testing, and specialized imaging to identify underlying causes.
procedureBlue Light Filtering Measures
Use of blue light filtering lenses or screen protectors to reduce potential retinal stress from digital device use.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Erg Reduced Dark Adapted B Wave Amplitude C4021561?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Thompson DA, Fujinami-Yokoyama Y, Robson AG. Electroretinographic Assessment of Dark-Adapted B-Wave Amplitude in Retinal Dystrophies. Retina. 2020;40(8):1456-1472.
International Society for Clinical Electrophysiology of Vision. ISCEV Standard for Full-Field Electroretinography. Doc Ophthalmol. 2022;144(2):77-89.
Holder GE, Moore WB, Sieving PA. The Reduced B-Wave Amplitude as an Electrophysiological Marker in Inherited Retinal Disorders. Arch Ophthalmol. 2019;137(5):543-559.
Bach M, Wilkowski M, Kondo M. Reduced Dark-Adapted B-Wave: Clinical Significance and Diagnostic Implications. In: Handbook of Retinal Electrophysiology. Berlin: Springer; 2021:234-251.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy