Which method is NOT used for determining monocular segment height for a progressive addition lens?

Determining monocular segment height for a progressive addition lens is crucial for proper lens fitting. The use of a corneal reflex pupillometer is not typically employed for this measurement because it primarily focuses on measuring the position of the pupil rather than the specific segment height required for progressive lenses.

A plastic millimeter ruler can be effectively used to measure segment height, allowing for an accurate and straightforward determination of vertical measurements. Marking fitting tape is also commonly utilized because it allows for precise marking on the patient’s face while accounting for angling of the lenses and features of their eyewear. Similarly, the corneal reflection fitting tape method provides a reliable way to assess the appropriate height based on the reflection of light from the cornea to the pupil.

In contrast, the corneal reflex pupillometer does not serve the specific function required in this context, making it the option that does not align with the methods typically used to determine monocular segment height for progressive addition lenses.