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The Twilight™ ROI Calculator: A Practical Model for Growth.

This interactive tool allows medical-billing optometrists to forecast the three-year economic impact of bringing Twilight Dark Adaptometer into the clinic. At a standard purchase price of $9,799 or annual lease of $4,979 (3 year minimum) and providing a new stream of revenue through CPT 92284 and 92288, the calculator demonstrates how rapidly this technology creates a new revenue stream. With a modest average of two daily tests, most practices should achieve a full return in less than 7 months.

Use this tool to model your specific patient volume, diagnostic mix, and local reimbursement rates for a 3-year ROI projection of your practice.

The calculator doesn’t include patients below 50 years of age who may qualify for a reimbursable DA diagnostic test.

Step 1: Practice Set Up

This initial step establishes the foundational parameters of your practice, setting the baseline for all subsequent calculations.

Step 2: Patient Volume & Eligibility

This section quantifies your patients above 50 years of age to determine the size of your eligible population.

Input the total number of patients your practice sees each week or month.
Input the percentage of your patients who are above 50 years of age.
0%50%100%
0 patients who qualify for DA screening monthly
Step 3: Patient Medical Conditions

This step analyzes your 50+ patient mix by focusing on the specific clinical conditions where the dark adaptation test is a medical necessity.

0%50%100%
Estimated Patients With or Suspected Early or Intermediate AMD: 0 patients/month
Extended Diagnostic Test Options (AMD):
0%50%100%
Estimated Patients With Diabetes or DR: 0 patients/month
Extended Diagnostic Test Options (Diabetes / DR):
0%50%100%
Estimated Patients With Suspected Drug-Related Retinal Toxicity: 0 patients/month
Extended Diagnostic Test Options (Drug-Related Retinal Toxicity):
Step 4: Financial Calculation

This step configures the exact revenue to compute your net return.

Enter your reimbursement amount for CPT code 92284
First, input your average local reimbursement rate for CPT code 92284 (the DA diagnostic test with interpretation and report). Rates can vary by payor and geographic region, historically ranging from $27 to $105 per test.
Secondly, model billing strategies for DA screening (CPT 92288) by designating a custom out-of-pocket patient cost or selecting Practice Pay, where the practice absorbs the test cost.
0 50+ patients without medical necessity for a DA diagnostic test
Calculated Cost per DA Screening
$0.00
Fixed cost divided by the number of patients tested + $5 mask.
Patient Pay
Patient is charged for DA screening (CPT 92288)
$
Practice Pay
Practice absorbs the screening overhead cost
$0.00
Clears every input across all calculator steps and removes your saved presets from this browser so you can start fresh.

Illustrative model only. Not a guarantee of reimbursement, coverage, or practice financial outcomes.