How important are lens oxygen ratings? Performance predictors for the concerned practitioner.

Area of Science:

• Ophthalmic optics
• Biomaterials science
• Corneal physiology

Background:

• Oxygen transmissivity (Dk/L), equivalent oxygen percentage (EOP), and pachometry are critical indices in contact lens practice.
• These metrics correlate but offer distinct insights into lens-eye interactions and corneal response to hypoxia.

Purpose of the Study:

• To highlight the significance of oxygen passage indices in contact lens practice.
• To elucidate the benefits of lens oxygen data for manufacturers, clinicians, and patients.

Main Methods:

• The study reviews the roles of Dk/L, EOP, and pachometry in assessing contact lens performance.
• It examines how these indices inform product development, clinical prescribing, and patient outcomes.

Main Results:

• Dk/L and EOP provide predictive data on lens-eye interactions.
• Pachometry reflects the cornea's actual response to lens-induced hypoxia.
• Lens oxygen data aids manufacturers in material selection, thickness optimization, and regulatory approval.

Conclusions:

• Lens oxygen data offers tangible benefits across the contact lens industry, from development to patient care.
• Effective use of oxygen ratings can improve patient satisfaction, ocular health, and potentially reduce costs.