Technically they are conditions rather than "restrictions", but that doesn't stop AVMED confusing things. And they don't need to be printed on medical certificates anyway....
67.200 Conditions applicable to certain medical certificates—correcting lenses
(1) In addition to any other condition imposed by or under this Part or Part 11, a medical certificate issued to a person who needs correcting lenses to satisfy the requirements of item 1.36 of table 67.150, item 2.36 of table 67.155 or item 3.34 of table 67.160 is subject to the conditions set out in subregulations (2) and (4).
(2) The person must have those correcting lenses available for use while exercising the privileges of a licence for which the certificate is required.
(3) If the person is the holder of, or an applicant for, a licence for which he or she is required to meet medical standard 1 or 2, the correcting lenses may be a pair of spectacles or a combination of contact lenses and a pair of spectacles.
(4) A person to whom subregulation (3) applies must have within reach, while he or she is performing duties essential to the operation of an Australian aircraft during flight time, a spare pair of spectacles for each pair of correcting lenses that he or she requires to meet the relevant medical standard.
(5) The holder of a medical certificate that is subject to a condition set out in subregulation (2) or (4) must not contravene the condition.
Penalty: 50 penalty units.
(6) An offence against subregulation (5) is an offence of strict liability.
Two sets have to be tested at medical exams now, because most pilots are stupid or criminals.