German to English translation (fluent speakers only, no net translations... thanks)?

Wenn eine Brille oder Kontaktlinsen getragen werden, ben枚tigen wir ein 盲rztliches Attest. Kann die Korrektur der Sehleistung ausschlie脽lich durch Kontaktlinsen vorgenommen werden, f眉hrt dies zur Polizeidienstuntauglichkeit.German to English translation (fluent speakers only, no net translations... thanks)?
It has already been translated so just a small addition:



There are some forms of bad eye sight which can only be efficieantly corrected with contact lenses not with glasses -if you suffer from this you are not fit for police service (in Austria also not for Army service - at least in my days).

If you are wearing contact lenses just because you feel that it looks better and glasses will do as well to correct your eyesight you must provide a certificate and can enter the police service.

The reason behind that is that contact lenses can be lost in service or should not be worn in certain circumstances (maybe under a protection mask) so if you can use glasses as backup you will be fine if not you might be a threat for your comrades or the public.German to English translation (fluent speakers only, no net translations... thanks)?
If eyeglasses or contacts are used, we need a medical certificate. If visual efficiency is only made by contacts, this leads to one being unfit for police service.

Danke, physical...und gl眉ckliches neues Jahr.German to English translation (fluent speakers only, no net translations... thanks)?
Nativexile got it, a bit clearer though:



If eyeglasses or contacts are worn, we need a medical certificate. If visual efficiency is only achieved with the contacts, the individual will be unfit for police services.
If glasses or contact lenses are worn, we need a doctor's certificate. If the sight correction can only be made using contact lenses, this will disqualify you from police service.



It means if you can *only* wear contact lenses you will not be able to work on the force. If you can wear both, you must provide a medical certificate.