EXHIBIT 10.3

NATIONAL SCIENTIFIC CORPORATION
2000 STOCK OPTION PLAN

        Section 1. Purpose of Plan. The purpose of the National Scientific Corporation 2000 Stock Option Plan (the “Plan”) shall be to provide for the grant to employees,
officers, directors, and consultants of the Company options to acquire Stock of the Company.

        Section 2. Definitions. Unless the context clearly indicates otherwise, the following terms, when used in the Plan, shall have the meanings set forth in this section.


        (a)  “Board” shall mean the Board of Directors of the Company.

        (b)  “Cause” shall mean (i) Grantee’s willful, material and irreparable breach of any agreement that governs the terms and conditions of his or her
employment; (ii) Grantee’s gross negligence or gross incompetence in the performance or intentional nonperformance (continuing for ten days after receipt of written notice of such negligence) of any of Grantee’s material duties and
responsibilities; (iii) Grantee’s dishonesty, fraud or misconduct with respect to the business or affairs of the Company or any Subsidiary; (iv) Grantee’s conviction of a felony; or (v) chronic alcohol abuse or illegal drug abuse by Grantee.

        (c)  A “Change in Control” of the Company shall occur when: (i) any “person” (as such term is used in Sections 13(d) and 14(d) of the Exchange Act)
is or becomes the “beneficial owner” (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the Company representing 30 percent or more of the combined voting power of the Company’s then outstanding
securities; (ii) as a result of, or in connection with, any tender offer or exchange offer, merger, or other business combination (a “Transaction”), the persons who were Directors of the Company immediately before the Transaction shall cease to
constitute a majority of the Board or any successor to the Company; (iii) the Company is merged or consolidated with another corporation and as a result of the merger or consolidation less than 75 percent of the outstanding voting securities of the
surviving or re
sulting corporation shall then be owned in the aggregate by the former shareholders of the Company; (iv) a tender offer or exchange offer is made and consummated for the ownership of securities of the Company representing 50 percent or more of the
combined voting power of the Company’s then outstanding voting securities; or (v) the Company transfers substantially all of its assets to another corporation which is not controlled by the Company.

        (d)  “Code” shall mean the Internal Revenue Code of 1986 as it may be amended from time to time.

        (e)  “Committee” shall mean the Board or, in the discretion of the Board, any Committee of two or more Directors that may be designated by the Board to
administer the Plan, all of which Committee’s members shall be Nonemployee Directors. Additionally, if any Options are intended to qualify as performance-based compensation under Section 162(m)(4)(C) of the Code, all members of the Committee granting
such Options shall be “outside directors” within the meaning of that Code section.

        (f)  “Company” shall mean National Scientific Corporation, a Texas corporation.

        (g)  “Consultant” shall mean any person who is engaged to perform services for the Company or its Subsidiaries, other than as an Employee or Director.


        (h)  “Control Person” shall mean any person who, as of the date of grant of an Option, owns (within the meaning of Section 422(b)(6) of the Code) stock
possessing more than ten percent of the total combined voting power or value of all classes of stock of the Company or of any Parent or Subsidiary.

        (i)  “Director” shall mean any member of the Board.

        (j)  “Employee” shall mean any full-time employee of the Company or any Subsidiary (including Directors who are otherwise employed on a full-time basis by the
Company or any Subsidiary).

        (k)  “Exchange Act” shall mean the Securities Exchange Act of 1934 as it may be amended from time to time.

        (l)  “Fair Market Value” of the Stock on a given date shall be based upon: (i) if the Stock is listed on a national securities exchange or quoted in an
interdealer quotation system, the last sales price or, if such price is 

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unavailable, the average of the closing bid and asked prices per share of the Stock on such date (or, if there was no trading or quotation in the Stock on such date, on the next preceding date on which there was trading or
quotation) as provided by one of such organizations; or (ii) if the Stock is not listed on a national securities exchange or quoted in an interdealer quotation system, the value as determined by the Board in good faith in its sole discretion. 

        (m)  “Grantee” shall mean a person granted an Option under the Plan.

        (n)  “ISO” shall mean an Option granted pursuant to the Plan to purchase shares of the Stock and intended to qualify as an incentive stock option under Section
422 of the Code, as now or hereafter constituted.

        (o)  “1933 Act” shall mean the Securities Act of 1933, as it may be amended from time to time.

        (p)  “Nonemployee Director” shall mean a Director who is a “nonemployee director” within the meaning of Rule 16b-3 under the Exchange Act and an
“outside director” within the meaning of Section 162(m) of the Code:

        (q)  “NQSO” shall mean an Option granted pursuant to the Plan to purchase shares of the Stock that is not an ISO.

        (r)  “Option” or “Options” shall refer to one or more NQSOs and ISOs issued under and subject to the Plan.

        (s)  “Parent” shall mean any parent corporation as defined in Section 424 of the Code.

        (t)  “Plan” shall mean the National Scientific Corporation 2000 Stock Option Plan as set forth herein and as amended from time to time.

        (u)  “SEC” means the United States Securities and Exchange Commission.

        (v)  “Stock” shall mean shares of the common stock, par value $.01 per share, of the Company.

        (w)  “Subsidiary” shall mean any corporation with respect to which the Company owns, directly or indirectly, 50 percent or more of the total combined voting
power of all classes of stock of such corporation.

        Section 3. Shares of Stock Subject to the Plan. Subject to the provisions of Section 11 hereof, the total amount of Stock with respect to which Options may be
granted under the Plan shall not exceed the greater of (i) 7,000,000 shares (subject to adjustment pursuant to Section 11 hereof) and (ii)15 percent of the total number of shares of Stock outstanding from time to time at the time of grant of any Option hereunder. Notwithstanding the foregoing, the total amount of Stock with respect to which ISOs may be
granted under the Plan shall not exceed 3,500,000 shares. Moreover, the total amount of Stock with respect to which Options may be granted under the Plan to any Grantee during the term of the Plan shall not exceed 1,000,000 shares. Stock issuable under
the Plan may be authorized but unissued shares or reacquired shares of Stock. If, prior to exercise, any Options are forfeited, lapse, or terminate for any reas
on, the Stock covered thereby shall again be available for Option grants under the Plan.

        Section 4. Administration of the Plan. The Plan shall be administered by the Committee. Subject to the express provisions of the Plan, the Committee shall have the
authority to interpret the Plan, to prescribe, amend, and rescind rules and regulations relating to the Plan, to determine the terms and provisions of stock option agreements thereunder, and to make all other determinations necessary or advisable for the
administration of the Plan. Any controversy or claim arising out of or related to the Plan or the Options granted thereunder shall be determined unilaterally by, and at the sole discretion of, the Committee. To the extent necessary to comply with Rule
16b-3 under the Exchange Act, determinations concerning Options granted to any person who is a Director or officer or otherwise subject to Section 16 of the Exchange Act shall be made by the Committee.

        Section 5. Limitation of Liability. Each member of the Committee shall be entitled to, in good faith, rely or act upon any report or other information furnished to him by
any officer or other employee of the Company or any subsidiary, the Company’s independent certified public accountants or any executive compensation consultant, legal counsel or other professional retained by the Company to assist in the
administration of the Plan. No member of the Committee, nor any officer or employee of the Company acting on behalf of the Committee, shall be personally liable for any action, determination or interpretation taken or made in good faith with respect to
the Plan, and all members of the Committee and any officer or employee of the Company acting on its behalf shall, to the 

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extent permitted by law, be fully indemnified and protected by the Company with respect to any such action, determination or interpretation.

        Section 6. Types of Options. Options granted under the Plan may be of two types: ISOs or NQSOs. The Committee shall have the authority and discretion to grant to an
eligible Employee either ISOs, NQSOs, or both but shall clearly designate the nature of each Option at the time of grant. Grantees who are not Employees of the Company or a Subsidiary on the date an Option is granted shall receive only NQSOs.

        Section 7. Grants of Options to Nonemployee Directors.

        (a)  Nonemployee Directors of the Company shall be eligible to receive Options under the Plan only pursuant to the provisions of this Section 7. Each individual
who agrees to become a Nonemployee Director shall receive, without the exercise of the discretion of any person, an NQSO under the Plan relating to the purchase of 5,000 shares of Stock on the date that the Nonemployee Director’s service as a
director commences. In addition, on the date of each annual meeting of the shareholders, each person who is a continuing Nonemployee Director on any such date shall receive, without the exercise of discretion of any person, an NQSO under the Plan relating
to the purchase of 5,000 shares of Stock. In the event that there are not sufficient shares available under the Plan to allow for the grant to each Nonemployee Director of an NQSO for the number of shares provided herein, each Nonemployee Director shall
receive an N
QSO for his pro rata share of the total number of shares of Stock available under the Plan.

        (b)  The exercise price of each share of Stock subject to an Option granted a Nonemployee Director shall equal the Fair Market Value of a share of Stock on the date such
Option is granted.

        (c)  Each Option granted to a Nonemployee Director shall become exercisable six (6) months from, and shall have a term of ten (10) years from, the date of the Option
grant. Notwithstanding the exercise period of any Option granted to a Nonemployee Director, all such Options shall immediately become exercisable upon (1) the death of a Nonemployee Director while serving as such or (2) a Change in Control.

        Section 8. Grants of Options to Employees and Consultants.

        (a)  Employees and Consultants of the Company and its Subsidiaries shall be eligible to receive Options under the Plan. Consultants of the Company shall receive only NQSOs
 .

        (b)  The exercise price per share of Stock subject to an Option granted to an Employee or Consultant shall be determined by the Committee; provided, however, that the
exercise price of each share subject to an ISO shall be not less than 100 percent  of the Fair Market Value of a share of the Stock on the date such Option is granted, or, in the case of an ISO granted to a Control Person, not less than 110 percent of
such Fair Market Value, and the exercise price of each share subject to an NQSO shall be not less than 25 percent of the Fair Market Value of a share of the Stock on the date such Option is granted.

        (c)  The term of each Option granted to an Employee or Consultant shall be determined by the Committee, provided that no ISO shall be exercisable more than ten years
from the date of grant of the Option and further provided that no ISO granted to a Control Person shall be exercisable more than five years from the date of grant of the Option.

        (d)  The Committee shall determine and designate from time to time Employees or Consultants who are to be granted Options, the nature of each Option granted and the
number of shares of Stock subject to each such Option.

        (e)  Notwithstanding any other provisions hereof, the aggregate Fair Market Value (determined at the time the ISO is granted) of the Stock with respect to which ISOs are
exercisable for the first time by any Employee during any calendar year under all plans of the Company and any Parent or Subsidiary corporation shall not exceed $100,000. To the extent the limitation set forth in the preceding sentence is exceeded, the
Options with respect to such excess shall be treated as NQSOs.

        (f)  The Committee, in its sole discretion, shall determine whether any Option granted to an Employee or Consultant shall become exercisable in one or more installments
and shall specify the installment dates. The Committee may also make such other provisions, not inconsistent with the terms of the Plan, as it may deem desirable, including such provisions as it may deem necessary to qualify any ISO under the provisions
of Section 

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422 of the Code. Without limitation of the foregoing, the Committee may, in its discretion, provide that Options shall immediately become exercisable upon (i) the death of an Employee or Consultant while in the employ of the
Company or any Subsidiary or (ii) a Change in Control.

        (g)  The Committee may, at any time, grant new or additional options to any eligible Employee or Consultant who has previously received Options under the Plan or options
under other plans, whether such prior Options or other options are still outstanding, have been exercised previously in whole or in part, or have been canceled. The exercise price of such new or additional Options may be established by the Committee,
subject to Section 8(b) hereof, without regard to such previously granted Options or other options.

        Section 9. Exercise of Options.

        (a)  A Grantee shall exercise an Option by delivery of written notice to the Company setting forth the number of shares with respect to which the Option is to be
exercised, together with cash, certified check, bank draft, or postal or express money order payable to the order of the Company for an amount equal to the Option price of such shares and any income tax required to be withheld. The Committee may, in its
sole discretion, permit a Grantee to pay all or a portion of the exercise price by a simultaneous sale of the shares of Stock to be issued pursuant to such exercise pursuant to a brokerage or similar arrangement.

        (b)  Except as provided pursuant to Section 10(a) hereof, no Option granted to an Employee or Consultant shall be exercised unless at the time of such exercise
the Grantee is then an Employee or Consultant of the Company or a Subsidiary.

        (c)  Except as provided in Section 10(a) hereof, no Option granted to a Nonemployee Director shall be exercised unless at the time of such exercise the Grantee is
then a Nonemployee Director.

        (d)  Before the Company issues Stock to a Grantee pursuant to the exercise of an NQSO, the Company shall have the right to require that the Grantee make such provision,
or furnish the Company such authorization, necessary or desirable so that the Company may satisfy its obligation under applicable income tax laws to withhold income or other taxes due upon or incident to such exercise.

        Section 10. Exercise of Options Upon Termination.

        (a)  Subject to Section 10(c) hereof, upon the termination of a Grantee’s relationship with the Company and its Subsidiaries, the period during which such
Grantee may exercise any outstanding exercisable installments of his Options that were exercisable at the date of termination of his relationship with the Company shall not exceed (i) if such termination is due to death or permanent and total disability
(within the meaning of Section 22(e)(3) of the Code), one year from the date of such termination, and (ii) in all other cases, three months (six months for Nonemployee Directors) from the date of such termination, provided, however, that in no event shall
the period extend beyond the expiration of the Option term. Notwithstanding the foregoing, all Options shall immediately terminate upon a termination of a Grantee’s employment if the Committee determines, in its sole discretion, that such termination
is fo
r Cause.

        (b)  In no event shall any Option be exercisable for more than the maximum number of shares that the Grantee was entitled to purchase at the date of termination of the
relationship with the Company and its Subsidiaries.

        (c)  The Committee may, in its discretion, extend the period of exercisability set forth in clauses (i) and (ii) in paragraph (a) above; provided, however, that such
period may not be extended for Options granted to Nonemployee Directors or for ISOs.

        (d)  Subject to Section 10(b) hereof, the sale of any Subsidiary shall be treated as a termination of employment with respect to any Grantee employed by such
Subsidiary.

        (e)  Subject to the foregoing, in the event of a Grantee’s death, Options may be exercised by the Grantee’s legal representative.

        Section 11. Adjustment Upon Changes in Capitalization. If the Company shall effect a subdivision or consolidation of shares or other increase or reduction of shares of
Stock outstanding without receiving compensation therefor in money, services or property, or any other change in corporate capital structure shall occur, then (a) the number of shares subject to outstanding Options shall be proportionately adjusted
(without a change in the total 

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price applicable to any such Option, but with a corresponding adjustment in the price per share), and (b) the number of shares available for issuance under Section 3 and Section 8(a) shall be proportionately
adjusted.

        Section 12. Restrictions on Issuing Shares. No Stock shall be issued or transferred under the Plan unless and until all applicable legal requirements have been complied
with to the satisfaction of the Committee. The Committee shall have the right to condition any Option on the Grantee’s undertaking in writing to comply with such restrictions on any subsequent disposition of the shares of Stock issued or transferred
thereunder as the Committee shall deem necessary or advisable as a result of any applicable law, regulation, official interpretation thereof, or underwriting agreement, and certificates representing such shares may be legended to reflect any such
restrictions.

        Section 13. Option Agreements; Miscellaneous Terms.

        (a)  Each Option shall be evidenced by a written agreement containing such terms and conditions, not inconsistent with the Plan, as the Committee shall approve. The
terms and provisions of such agreements may vary among Grantees and among different Options granted to the same Grantee.

        (b)  The grant of an Option in any year shall not give the Grantee any right to similar grants in future years, any right to continue such Grantee’s employment
relationship with the Company or its Subsidiaries, or, until such Option is exercised and share certificates are issued, any rights as a Stockholder of the Company. All Grantees shall remain subject to discharge to the same extent as if the Plan were not
in effect.

        (c)  No Grantee, and no beneficiary or other persons claiming under or through the Grantee, shall have any right, title, or interest by reason of any Option to any
particular assets of the Company or its Subsidiaries or any shares of Stock allocated or reserved for the purposes of the Plan or subject to any Option except as set forth herein. The Company shall not be required to establish any fund or make any other
segregation of assets to assure the payment of any Option.

        (d)  No Option may be transferred, assigned, pledged, encumbered, or charged, except by will or the laws of descent and distribution, and an Option shall be exercisable
during the Grantee’s lifetime only by the Grantee.

        (e)  The issuance of shares of Stock to Grantees or to their legal representatives shall be subject to any applicable taxes and other laws or regulations of the United
States or of any state having jurisdiction thereof.

        Section 14. Amendment and Termination. The Board may, at any time, alter, amend, suspend, discontinue, or terminate the Plan; provided, however, that no such action shall
adversely affect the rights of Grantees to Options previously granted hereunder and provided further that any stockholder approval necessary or desirable in order to comply with Rule 16b-3 under the Exchange Act or with Section 422 of the Code (or other
applicable law or regulation) shall be obtained in the manner required therein.

        Section 15. Compliance With Section 16(b). In the case of recipients of Options under the Plan who are or may be subject to Section 16 of the Exchange Act, it is the intent
of the Company that the Plan and any Option granted hereunder satisfy and be interpreted in a manner that satisfies the applicable requirements of Rule 16b-3 under the Exchange Act, so that such persons will be entitled to the benefits of Rule 16b-3 under
the Exchange Act or other exemptive rules under Section 16 of the Exchange Act and will not be subject to liability thereunder. If any provision of the Plan or any award of Options would otherwise conflict with the intent expressed herein, that provision,
to the extent possible, shall be interpreted and deemed amended so as to avoid such conflict. To the extent of any remaining irreconcilable conflict with such intent, such provision shall be deemed void as applicable to recipients who are or may be subject
 Section 16 of the Exchange Act.

        Section 16. Compliance with Code Section 162(m). It is the intent of the Company that the Options awarded pursuant to the Plan shall constitute “qualified
performance-based compensation” within the meaning of the Code Section 162(m). Accordingly, if any provision of the Plan or any award agreement relating to such Options does not comply or is inconsistent with the requirements of Code Section 162(m),
such provision shall be construed or deemed amended to the extent necessary to conform to such requirements, and no provision shall be deemed to confer upon the Committee or any other person discretion to increase the amount of compensation otherwise
payable in connection with any such Award upon attainment of the performance objectives.

        Section 17. Market Standoff. In connection with any underwritten public offering by the Company of its equity securities pursuant to an effective registration statement
filed under the 1933 Act, the Grantee may not sell, 

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make any short sale of, loan, hypothecate, pledge, grant any option for the purchase of, or otherwise dispose or transfer for value or otherwise agree to exchange in any of the foregoing transactions with respect to any shares
of Stock acquired upon exercise of an Option granted hereunder without the prior written consent of the Company and its underwriters. Such restriction (the “Market Standoff”) shall be in effect for such period of time from and after the
effective date of the final prospectus for the offering as may be requested by the Company or its underwriters. The Grantee shall be required to execute such agreements as the Company or its underwriters request in connection with the Market Standoff.

        Section 18. Effective Date of Plan. The Plan shall be effective upon its adoption by the Board. The Plan must be approved by the Company’s shareholders within twelve
(12) months of its establishment. No ISO may be granted more than ten years after the Plan is approved by the Board or the Company’s shareholders, whichever is earlier.

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