Opthea Ltd — Capital/Financing Update 2010

Aug 15, 2010

Rule 2.7, 3.10.3, 3.10.4, 3.10.5

Appendix 3B

New issue announcement, application for quotation of additional securities

and agreement

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public.

Introduced 1/7/96. Origin: Appendix 5. Amended 1/7/98, 1/9/99, 1/7/2000, 30/9/2001, 11/3/2002, 1/1/2003.

Name of entity

CIRCADIAN TECHNOLOGIES LIMITED

ABN

32 006 340 567

We (the entity) give ASX the following information.

Part 1 - All issues

You must complete the relevant sections (attach sheets if there is not enough space).

1 +Class of+securities issued or to be issued 2 Number of+securities issued or to be issued (if known) or maximum number which may be issued 3 Principal terms of the+securities (eg, if options, exercise price and expiry date; if partly paid+securities, the amount outstanding and due dates for payment; if +convertible securities, the conversion price and dates for conversion) 4 Do the+securities rank equally in all respects from the date of allotment with an existing+class of quoted+securities? If the additional securities do not rank equally, please state:  the date from which they do  the extent to which they participate for the next dividend, (in the case of a trust, distribution) or interest payment  the extent to which they do not rank equally, other than in relation to the next dividend, distribution or interest payment	Ordinary shares
	1,155,000
	Fully paid
	Yes

• See chapter 19 for defined terms.

1/1/2003

Appendix 3B Page 1

5 Issue price or consideration 6 Purpose of the issue (If issued as consideration for the acquisition of assets, clearly identify those assets) 7 Dates of entering+securities into uncertificated holdings or despatch of certificates	33% interest in Vegenics Limited as detailed in point 6 below (the issue of shares has increased Circadian’s interest in Vegenics Limited to 100%).
	Circadian is issuing the final tranche of shares to the international Ludwig Institute for Cancer Research (LICR) and Licentia Limited (Licentia) in consideration of the purchase of Vegenics Limited. A further 1,155,000 Circadian shares are being issued to LICR (532,455 shares) and Licentia (622,545 shares) on the 2ndanniversary of Circadian’s acquisition of Vegenics Limited (i.e. 2 years from 14 August 2008).
	16 August 2010

• 8 Number and[+] class of all[+] securities quoted on ASX ( including the securities in clause 2 if applicable)

• 9 Number and[+] class of all[+] securities not quoted on ASX ( including the securities in clause 2 if applicable)

Number	+Class
46,396,928	Ordinary shares
Number	+Class
1,367,694 99,305 500,000 881,667 100,000 100,000	Options expiring 8 February 2012 Exercise price: $1.50 (CIRAQ) Options expiring 9 March 2012 Exercise price: $1.50 (CIRAS) Options expiring 8 February 2012 Exercise price: $1.30 (CIRAU) Options expiring 15 September 2012 Exercise price: $1.00 (CIRAI) Options expiring 15 December 2012 Exercise price: $1.00 (CIRAY) Options expiring 26 June 2013 Exercise price: $1.00 (CIRAK)

• 10 Dividend policy (in the case of a trust, distribution policy) on the increased capital (interests)

Not applicable.

Part 2 - Bonus issue or pro rata issue

• 11 Is security holder approval required?

• 12 Is the issue renounceable or non-renounceable?

• 13 Ratio in which the[+] securities will be offered

• 14 +Class of +securities to which the offer relates 15 +Record date to determine entitlements

Not applicable. Not applicable. Not applicable. Not applicable. Not applicable.

• See chapter 19 for defined terms.

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16 Will holdings on different registers (or subregisters) be aggregated for calculating entitlements? 17 Policy for deciding entitlements in relation to fractions 18 Names of countries in which the entity has+security holders who will not be sent new issue documents Note: Security holders must be told how their entitlements are to be dealt with. Cross reference: rule 7.7. 19 Closing date for receipt of acceptances or renunciations 20 Names of any underwriters 21 Amount of any underwriting fee or commission 22 Names of any brokers to the issue 23 Fee or commission payable to the broker to the issue 24 Amount of any handling fee payable to brokers who lodge acceptances or renunciations on behalf of+security holders 25 If the issue is contingent on+security holders’ approval, the date of the meeting 26 Date entitlement and acceptance form and prospectus or Product Disclosure Statement will be sent to persons entitled 27 If the entity has issued options, and the terms entitle option holders to participate on exercise, the date on which notices will be sent to option holders 28 Date rights trading will begin (if applicable)	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.

• See chapter 19 for defined terms.

Appendix 3B Page 4

1/1/2003

29 Date rights trading will end (if applicable) 30 How do+security holders sell their entitlements_in full_through a broker? 31 How do+security holders sell_part_ of their entitlements through a broker and accept for the balance? 32 How do+security holders dispose of their entitlements (except by sale through a broker)? 33 +Despatch date	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.

Part 3 - Quotation of securities

You need only complete this section if you are applying for quotation of securities

• 34 Type of securities

• ( tick one )

• (a) √ Securities described in Part 1

• (b)[All other securities ]

Example: restricted securities at the end of the escrowed period, partly paid securities that become fully paid, employee incentive share securities when restriction ends, securities issued on expiry or conversion of convertible securities

Entities that have ticked box 34(a)

Additional securities forming a new class of securities (NOT APPLICABLE)

Tick to indicate you are providing the information or documents

• 35[If the ][+][securities are ][+][equity securities, the names of the 20 largest holders of the ] additional[+] securities, and the number and percentage of additional[+] securities held by those holders. Not applicable.

• 36[If the ] +securities setting out the number of holders in the categories.[+][securities are ][+][equity securities, a distribution schedule of the additional ] Not applicable. 1 - 1,000 1,001 - 5,000 5,001 - 10,000 10,001 - 100,000 100,001 and over

• 37[A copy of any trust deed for the additional ][+][securities. ] [Not applicable.]

• See chapter 19 for defined terms.

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Entities that have ticked box 34(b)

38 Number of securities for which +quotation is sought 39 Class of+securities for which quotation is sought 40 Do the+securities rank equally in all respects from the date of allotment with an existing+class of quoted +securities? If the additional securities do not rank equally, please state:  the date from which they do  the extent to which they participate for the next dividend, (in the case of a trust, distribution) or interest payment  the extent to which they do not rank equally, other than in relation to the next dividend, distribution or interest payment 41 Reason for request for quotation now Example: In the case of restricted securities, end of restriction period (if issued upon conversion of another security, clearly identify that other security) 42 Number and+class of all+securities quoted on ASX (_including_the securities in clause 38)	Not applicable.
	Not applicable.
	Not applicable.
	Not applicable.
	Number	+Class
	Not applicable.

• See chapter 19 for defined terms.

Appendix 3B Page 6

1/1/2003

Quotation agreement (Not applicable)

• 1 +Quotation of our additional +securities is in ASX’s absolute discretion. ASX may quote the[+] securities on any conditions it decides.

• 2 We warrant the following to ASX.

• The issue of the[+] securities to be quoted complies with the law and is not for an illegal purpose.

• There is no reason why those[+] securities should not be granted[+] quotation.

• An offer of the[+] securities for sale within 12 months after their issue will not require disclosure under section 707(3) or section 1012C(6) of the Corporations Act.

Note: An entity may need to obtain appropriate warranties from subscribers for the securities in order to be able to give this warranty

• Section 724 or section 1016E of the Corporations Act does not apply to any applications received by us in relation to any[+] securities to be quoted and that no-one has any right to return any[+] securities to be quoted under sections 737, 738 or 1016F of the Corporations Act at the time that we request that the[+] securities be quoted.

• We warrant that if confirmation is required under section 1017F of the Corporations Act in relation to the[+] securities to be quoted, it has been provided at the time that we request that the[+] securities be quoted.

• If we are a trust, we warrant that no person has the right to return the +securities to be quoted under section 1019B of the Corporations Act at the time that we request that the[+] securities be quoted.

• 3 We will indemnify ASX to the fullest extent permitted by law in respect of any claim, action or expense arising from or connected with any breach of the warranties in this agreement.

• 4 We give ASX the information and documents required by this form. If any information or document not available now, will give it to ASX before[+] quotation of the[+] securities begins. We acknowledge that ASX is relying on the information and documents. We warrant that they are (will be) true and complete.

Sign here: Company secretary

Date: 16 August 2010

Print name: SUSAN MADDEN

== == == == ==

• See chapter 19 for defined terms.

1/1/2003

Appendix 3B Page 7