Document:

AMENDMENT NO. 17 TO LOAN AND SECURITY AGREEMENT

                                                                 May 3, 2000

Health Fitness Corporation
3500 West 80th Street, Suite 130
Bloomington, Minnesota 55431

Ladies and Gentlemen:

         Ableco Finance LLC, The Long Horizons Overseas Fund, Ltd., Styx
Partners, L.P. and Styx International, Ltd., as direct or indirect assignees of
Madeleine L.L.C. (individually and collectively, "Lender") and Health Fitness
Corporation ("Borrower") have entered into certain financing arrangements as set
forth in the Loan and Security Agreement, dated February 17, 1998 by and among
Lender, Borrower and Health Fitness Rehab, Inc., The Preferred Companies, Inc.,
Health Fitness Rehab of Iowa, Inc., Duffy & Associates Physical Therapy Services
Corp., Medlink Corporation, Medlink Services, Inc., Fitness Centers of America,
Sports & Orthopedic Physical Therapy, Inc., Midlands Physical Therapy, Inc. and
International Fitness Club Network, Inc. (collectively, "Guarantors"), as
amended pursuant to Amendment No. 1 to Loan and Security Agreement, dated
February 28, 1998, by and among Lender, Borrower and Guarantors, Amendment No. 2
to Loan and Security Agreement, dated June 4, 1998, by and among Lender,
Borrower and Guarantors, Amendment No. 3 to Loan and Security Agreement, dated
June 26, 1998, by and among Lender, Borrower and Guarantors, Amendment No. 4 to
Loan and Security Agreement, dated September 10, 1998, by and among Lender,
Borrower and Guarantors, Amendment No. 5 to Loan and Security Agreement, dated
November 2, 1998, by and among Lender, Borrower and Guarantors, Amendment No. 6
to Loan and Security Agreement, dated January 8, 1999, by and among Lender,
Borrower and Guarantors ("Amendment No. 6"), Amendment No. 7 to Loan and
Security Agreement, dated February 26, 1999, by and among Lender, Borrower and
Guarantors, Amendment No. 8 to Loan and Security Agreement, dated as of March
12, 1999, by and among Lender, Borrower and Guarantors, Consent and Amendment
No. 9 to Loan and Security Agreement, dated as of May 10, 1999, by and among
Lender, Borrower and Guarantors, Consent and Amendment No. 10 to Loan and
Security Agreement, dated May 24, 1999, by and among Lender, Borrower and
Guarantors, as amended by a letter agreement dated as of June 1, 1999, by and
among Lender, Borrower and Guarantors, Consent and Amendment No. 11 to Loan and
Security Agreement, dated as of June 30, 1999, by and among Lender, Borrower and
Guarantors, Amendment No. 12 to Loan and Security Agreement, dated July 15,
1999, by and among Lender, Borrower and Guarantors, Consent and Amendment No. 13
to Loan and Security Agreement, dated as of September 22, 1999, by and among
Lender, Borrower and Guarantors, Consent and Amendment No. 14 to Loan and
Security Agreement, dated October 12, 1999, by and among Lender, Borrower and
Guarantors, Amendment No. 15 to Loan and Security Agreement, dated December 20,
1999, by and among Lender, Borrower and Guarantors and Amendment No. 16 to Loan
and Security Agreement, dated March 15, 2000, by and among Lender, Borrower and
Guarantors (and together with all supplements thereto and as the same may
hereafter be further amended, modified, supplemented, extended, renewed,
restated or replaced, the "Loan Agreement") and other agreements, documents and
instruments referred to therein or at any time executed and/or delivered in

<PAGE>

connection therewith or related thereto, including this letter agreement (all of
the foregoing, together with the Loan Agreement, as the same now exist or may
hereafter be amended, modified, supplemented, extended, renewed, restated or
replaced, being collectively referred to herein as the "Financing Agreements").

         Borrower and Guarantors have requested certain amendments to the Loan
Agreement and Lender is willing to agree to such amendments, subject to the
terms and conditions set forth herein.

         In consideration of the foregoing, and other good and valuable
consideration, the parties hereto agree as follows:

         1. Definitions. For purposes of this Amendment, unless otherwise
defined herein, all terms used herein, including, but not limited to, those
terms used and/or defined in the recitals above, shall have the respective
meanings assigned to such terms in the Loan Agreement.

         2.  Waivers.

               (a) Subject to the terms and condition contained herein, Lender
hereby waives the Event of Default arising under Section 9.1(b) of the Loan
Agreement as a result of the failure of Borrower to comply with Section 8.10,
Section 8.10A and Section 8.11 of the Loan Agreement as of March 31, 2000,
provided, that, (i) such waiver shall only apply to the failure of Borrower to
comply with such Sections for the period from January 1, 2000 through and
including March 31, 2000 (and not as of the end of any month thereafter) and
(ii) such waiver shall not be effective unless and until Lender shall have
received an original of this Amendment duly executed and delivered by Borrower
and Guarantors.

               (b) Lender has not waived, is not by this Amendment waiving, and
has no intention of waiving any other Event of Default which may have occurred
on or prior to the date hereof, whether or not continuing on the date hereof, or
which may occur after the date hereof (whether the same or similar to the Events
of Default referred to above), other than the Event of Default specifically
referred to in Section 2(a) for the period ending March 31, 2000. Upon the
occurrence of any other Event of Default, whether or not continuing on the date
hereof, or which may occur on or after the date hereof (whether the same or
similar to the Event of Default described above, including an Event of Default
pursuant to the failure of Borrower and Guarantors to comply with Sections 8.10,
8.10A or 8.11 of the Loan Agreement as of the last day of any month after March
31, 2000), Lender shall have and hereby specifically reserves the right in its
discretion, to exercise any and all of its rights and remedies under the Loan
Agreement, the other Financing Agreements, applicable law or otherwise.

<PAGE>

               (c) The foregoing waiver shall not be construed as a bar to or a
waiver of any other or further Event of Default on any future occasion; whether
similar in kind or otherwise and shall not constitute a waiver, express or
implied of any of the rights and remedies of Lender arising under the terms of
the Financing Agreements of any future occasion or otherwise.

         3. Further Assurances. The parties hereto shall execute and deliver
such additional documents and take such additional action as may be necessary or
proper to effectuate the provisions and purposes of this Amendment.

         4. Governing Law. The rights and obligations hereunder of each of the
parties hereto shall be governed by and interpreted and determined in accordance
with the internal laws of the State of New York (without giving effect to
principles of conflicts of law or choice of law).

         5. Counterparts. This Amendment may be executed in any number of
counterparts, but all of such counterparts shall together constitute but one and
the same agreement. In making proof of this Amendment, it shall not be necessary
to produce or account for more than one counterpart hereof signed by each of the
parties hereto.

                               Very truly yours,

                               ABLECO FINANCE LLC, for itself
                                and as agent

                               By:

                               Title:
AGREED:

HEALTH FITNESS CORPORATION
HEALTH FITNESS REHAB, INC.
DUFFY & ASSOCIATES PHYSICAL
THERAPY SERVICES CORP.
THE PREFERRED COMPANIES, INC.
MEDLINK CORPORATION
HEALTH FITNESS REHAB OF IOWA, INC.
MEDLINK SERVICES, INC.
FITNESS CENTERS OF AMERICA
SPORTS & ORTHOPEDIC PHYSICAL THERAPY, INC.
INTERNATIONAL FITNESS CLUB NETWORK, INC.
MIDLANDS PHYSICAL THERAPY, INC.

By:

Title:Summit Autonomous

21 Hickory Drive
Waltham, Massachusetts 02451

(781) 890-1234

For Immediate Release

         SUMMIT AUTONOMOUS ANNOUNCES AGREEMENT TO SELL LENS EXPRESS UNIT

Waltham, MA, May 4, 2000- Summit Technology, Inc. (NASDAQ: BEAM) announced today
that the  Company  has  entered  into a  definitive  agreement  to sell its Lens
Express business unit to Strategic Optical Holdings,  Inc. for $31 million cash,
plus a minority equity  interest in the acquiror.  The transaction is subject to
customary closing conditions.

"We are pleased to have entered into a  definitive  purchase and sale  agreement
for Lens Express,"  commented  Robert J. Palmisano,  Chief Executive  Officer of
Summit  Autonomous.  "I have stated  previously  that Lens  Express is no longer
strategic  to our  goal of  becoming  the  leading  developer  and  marketer  of
differentiated  ophthalmic  products and services for  refractive  surgeons.  By
divesting the Company of the Lens Express business unit, we can better focus our
efforts on growing  market  share and widening  the  technological  lead we have
established  with  the  LADARVision(R)   laser  system--the  only  system  which
incorporates  FDA  approved  laser  radar eye  tracking,"  Palmisano  continued.
"Finally,  I would like to  acknowledge  everyone at Lens Express for their many
contributions to the Company," concluded Mr. Palmisano.

Founded in 1985,  Summit  Autonomous is a leading  developer,  manufacturer  and
marketer of ophthalmic  laser systems and related  products  designed to correct
common vision disorders such as nearsightedness, farsightedness and astigmatism.
In 1995,  Summit  Autonomous  was the first excimer laser company to receive FDA
approval  for its excimer  laser system for the  correction  of mild to moderate
myopia  in the U.S.  and in 1999  became  the  first  commercial  excimer  laser
manufacturer   to  receive  FDA  approval  for  the  popular  LASIK   procedure.
Autonomous, a wholly owned subsidiary,  is engaged in the design and development
of next-generation  excimer laser instruments for laser refractive surgery.  The
Company's  LADARVision(R)  system  combines laser radar eye tracking with narrow
beam shaping technology and is the only FDA approved laser system to incorporate
an eye-tracker during surgery. In addition, through its wholly owned subsidiary,
Lens Express, Summit Autonomous sells contact lenses and related products.

Cautionary  Statement under "Safe harbor"  Provisions of the Private  Securities
Litigation  Reform Act of 1995:  Statements  made in this news  release  contain
information about the Company's future business prospects.  These statements may
be  considered  "forward  looking".  These  statements  are subject to risks and
uncertainties  that could cause actual results to differ  materially  from those
set forth in or implied by such forward  looking  statements.  Among these risks
and  uncertainties  are:   competition  from  other   manufacturers  and  vision
correction technologies, delays in obtaining regulatory approvals, challenges to
patents  owned and licensed by the Company  affecting  per  procedure  revenues,
adverse  litigation  results,  difficulties in  commercializing  the LADARVision
system and dependence on sole source suppliers.

For additional  information  and risks  associated  with the Company's  business
prospects and future operating results,  please refer to Summit's public filings
with the Securities and Exchange Commission.

For more information contact:

Kate Sturgis Burnham

Vice President, Investor Relations & Corporate Communications
Summit Autonomous

(781) 672-0517
877-BEAM-333
kate.burnham@summitautonomous.com

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