Dark adaptation examination with interpretation and report
CPT4 code
Name of the Procedure:
Dark Adaptation Examination with Interpretation and Report
- Common Name: Dark Adaptation Test
- Technical Term: Scotopic Sensitivity Testing
Summary
The dark adaptation examination is a test that measures how well the eyes adjust from bright light to darkness. This process evaluates the time it takes for the eyes to regain sensitivity in low-light conditions.
Purpose
- Medical Condition: Age-related macular degeneration, retinitis pigmentosa, and other retinal conditions.
- Goals: To assess the functional capacity of the rod cells in the retina, which are responsible for vision in dim light.
- Expected Outcomes: To diagnose and determine the severity of retinal diseases affecting night vision.
Indications
- Symptoms: Difficulty seeing at night, impaired vision in low-light environments, unexplained vision loss.
- Conditions: Age-related macular degeneration, retinitis pigmentosa, Vitamin A deficiency, and congenital night blindness.
Preparation
- Instructions: Patients should avoid bright light exposure and refrain from wearing contact lenses for a specific period before the test as advised by their healthcare provider.
- Diagnostic Tests: Basic eye exam and medical history review.
Procedure Description
- Initial Assessment: Visual acuity test and eye examination.
- Dark Adaptation: The patient rests in a dark room for about 20-30 minutes to allow the eyes to adjust to the dark environment.
- Testing: A piece of specialized equipment, known as a dark adaptometer, is used. The patient will look at a series of dimming red lights and press a button when they can no longer see the light.
- Recording: The test records how quickly and efficiently the eyes regain low-light sensitivity.
Duration
- Approximately 30-60 minutes.
Setting
- Typically performed in an ophthalmologist's office or specialized vision testing clinic.
Personnel
- Ophthalmologist or optometrist
- Trained technical staff
Risks and Complications
- Common Risks: None
- Rare Risks: Mild discomfort or eye strain
- Complications: Very rare, minimal risk involved
Benefits
- Expected Benefits: Accurate diagnosis of night vision problems, tailored treatment plans.
- Realization Time: Immediate result interpretation and reporting.
Recovery
- Post-Procedure Care: No specific care required.
- Recovery Time: Immediate return to normal activities.
- Follow-Up: Based on test results, further appointments may be scheduled for treatment or monitoring.
Alternatives
- Other Options: Electroretinography (ERG), visual field testing, genetic testing for hereditary conditions.
- Pros and Cons: Dark adaptation testing is non-invasive and quick, whereas alternatives might provide more detailed retinal function information but could be more intrusive or costly.
Patient Experience
- During Procedure: Patient may feel discomfort due to prolonged darkness or eye strain from focusing on dim lights.
- Post-Procedure: Minimal to no discomfort, and normal vision returns immediately after the test. If any discomfort persists, over-the-counter pain relief or rest may be advised.
- Pain Management: Generally, no pain management needed, as the procedure is non-invasive.