The Florida Motorcycle Handbook states on page 13-14:
4.2.2 - Eye and Face Protection
A plastic shatter-resistant face shield can help protect your whole face in a crash. It also protects you
from wind, dust, dirt, rain, insects and pebbles thrown up from cars ahead. These problems are
distracting and can be painful. If you have to deal with them, you can’t devote your full attention to the
road. Goggles protect your eyes, though they won’t protect the rest of your face like a face shield does.
A windshield is not a substitute for a face shield or goggles. Most windshields will not protect your eyes
from the wind. Neither will eyeglasses or sunglasses. Glasses won’t keep your eyes from watering, and
they might blow off when you turn your head while riding.
To be effective, eye or face shield protection must:
• Be free of scratches.
• Be resistant to penetration.
• Give a clear view to either side.
• Fasten securely, so it does not blow off.
• Permit air to pass through, to reduce fogging.
• Permit enough room for eyeglasses or sunglasses, if needed.
Tinted eye protection should not be worn at night or any other time when little light is available.
The 2012 Florida statute says:
Title XXIII
MOTOR VEHICLES Chapter 316
STATE UNIFORM TRAFFIC CONTROL View Entire Chapter
316.211 Equipment for motorcycle and moped riders.—
(1) A person may not operate or ride upon a motorcycle unless the person is properly wearing protective headgear securely fastened upon his or her head which complies with Federal Motorcycle Vehicle Safety Standard 218 promulgated by the United States Department of Transportation. The Department of Highway Safety and Motor Vehicles shall adopt this standard by agency rule.
(2) A person may not operate a motorcycle unless the person is wearing an eye-protective device over his or her eyes of a type approved by the department.
(3)(a) This section does not apply to persons riding within an enclosed cab or to any person 16 years of age or older who is operating or riding upon a motorcycle powered by a motor with a displacement of 50 cubic centimeters or less or is rated not in excess of 2 brake horsepower and which is not capable of propelling such motorcycle at a speed greater than 30 miles per hour on level ground.
(b) Notwithstanding subsection (1), a person over 21 years of age may operate or ride upon a motorcycle without wearing protective headgear securely fastened upon his or her head if such person is covered by an insurance policy providing for at least $10,000 in medical benefits for injuries incurred as a result of a crash while operating or riding on a motorcycle.
(4) A person under 16 years of age may not operate or ride upon a moped unless the person is properly wearing protective headgear securely fastened upon his or her head which complies with Federal Motorcycle Vehicle Safety Standard 218 promulgated by the United States Department of Transportation.
(5) The department shall make available a list of protective headgear approved in this section, and the list shall be provided on request.
(6) Each motorcycle registered to a person under 21 years of age must display a license plate that is unique in design and color.
(7) A violation of this section is a noncriminal traffic infraction, punishable as a nonmoving violation as provided in chapter 318.
History.—s. 1, ch. 71-135; s. 1, ch. 76-31; s. 1, ch. 85-329; s. 23, ch. 87-161; s. 2, ch. 88-405; s. 321, ch. 95-148; ss. 4, 167, ch. 99-248; s. 6, ch. 2000-313; s. 13, ch. 2006-290.
Note.—Former s. 316.287.
There seems to be separate descriptions of 'protective headgear' (section 1) & 'eye-protective device' (section 2). The statue seems to give people over the age of 21, who have sufficient medical insure, a pass on the protective headgear, but does not give a pass on the use of eye-protective devices (section 3(b)).
You might prevail in court or might not. Either way, you should have a better understanding of the statute after the hearing than before.
Good luck!