EXHIBIT 23 CONSENT OF INDEPENDENT REGISTERED CHARTERED ACCOUNTANTS We consent to the incorporation by reference in the Registration Statement Nos. 333-110306 and 333-126606 of QLT Inc. on Form S-3 and Registration Statement Nos. 333-2488, 333-12422, 333-100070 and 333-120657 of QLT Inc. on Form S-8 of our reports dated March 14, 2006, relating to the financial statements and financial statement schedules of QLT Inc. and management's report on the effectiveness of internal control over financial reporting appearing in the Annual Report on Form 10-K of QLT Inc. for the year ended December 31, 2005. /S/ DELOITTE & TOUCHE LLP Independent Registered Chartered Accountants Vancouver, Canada March 14, 2006