From DR. BOLI’S ALPHABET OF OCCUPATIONS.

O for the Optometrist,
An ocular idealist:
Her goal she states with prompt precision:
            Twenty-twenty vision.

Her work requires painstaking care;
No “good enough,” or “nearly there.”
She spends her whole life making glasses
            For the upper classes.

But though she does her work so well,
Her glasses still don’t seem to sell.
She’s missed her clients’ ruling passion:
            Frames that are in fashion.