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Corneal hysteresis determination is a specialized diagnostic test that assesses the biomechanical properties of the cornea, which is the transparent front part of the eye. This procedure utilizes air impulse stimulation to evaluate how the cornea responds to pressure changes. During the test, an air pump generates a brief air impulse that causes the cornea to temporarily flatten or depress, moving inward from its usual convex shape. Following this initial flattening, the air pump ceases operation, allowing the cornea to return to its original shape. The test measures the rate of this movement through two distinct phases of flattening and the subsequent return to the normal convex configuration. The time delays observed during these phases are quantified and referred to as hysteresis. This measurement is crucial as it provides insights into the corneal health and can be indicative of various ocular conditions. The procedure is performed bilaterally, meaning both eyes are tested simultaneously, and includes an interpretation of the results along with a comprehensive report for further clinical evaluation.
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The corneal hysteresis determination test is indicated for various clinical scenarios where assessment of corneal biomechanical properties is necessary. The following conditions may warrant this procedure:
The procedure for corneal hysteresis determination involves several key steps that ensure accurate measurement and assessment of the cornea's response to air impulse stimulation. The following outlines the procedural steps:
Post-procedure care for corneal hysteresis determination is generally minimal, as the test is non-invasive and does not typically result in any discomfort or complications. Patients may resume their normal activities immediately following the test. However, it is advisable for patients to avoid rubbing their eyes or exposing them to irritants for a short period after the procedure. The results of the test will be discussed with the patient during a follow-up appointment, where the physician will interpret the findings and recommend any necessary further evaluations or treatments based on the corneal hysteresis values obtained.
| Short Descr | CORNEAL HYSTERESIS | Medium Descr | CORNEAL HYSTERESIS AIR IMPULSE STIMJ BI W/I&R | Long Descr | Corneal hysteresis determination, by air impulse stimulation, bilateral, with interpretation and report | Status Code | Carriers Price the Code | Global Days | XXX - Global Concept Does Not Apply | PC/TC Indicator (26, TC) | 0 - Physician Service Code | Multiple Procedures (51) | 0 - No payment adjustment rules for multiple procedures apply. | Bilateral Surgery (50) | 0 - 150% payment adjustment for bilateral procedures does NOT apply. | Physician Supervisions | 09 - Concept does not apply. | Assistant Surgeon (80, 82) | 0 - Payment restriction for assistants at surgery applies to this procedure... | Co-Surgeons (62) | 0 - Co-surgeons not permitted for this procedure. | Team Surgery (66) | 0 - Team surgeons not permitted for this procedure. | Diagnostic Imaging Family | 99 - Concept Does Not Apply | APC Status Indicator | Procedure or Service, Not Discounted when Multiple | Type of Service (TOS) | Q - Vision Items or Services | Berenson-Eggers TOS (BETOS) | T2A - Other tests - electrocardiograms | MUE | Not applicable/unspecified. | CCS Clinical Classification | 18 - Diagnostic procedures on eye |
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| 2015-01-01 | Deleted | Code deleted, see 92145 |
| 2008-01-01 | Added | First appearance in code book in 2008. |
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