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The contents of all material available on this Internet site are copyrighted by the Prevention of Blindness Society of Metropolitan Washington (POB) unless otherwise indicated. Copyright is not claimed as to any part of an original work prepared by a U.S. or state government officer or employee as part of that person's official duties. All rights are reserved by POB, and content may not be reproduced, downloaded, disseminated, published, or transferred in any form or by any means, except with the prior written permission of POB, or as indicated below. Members of POB may download pages or other content for their own use, consistent with the mission and purpose of POB on a single computer. However, no part of such content may be otherwise or subsequently reproduced, downloaded, disseminated, published, or transferred, in any form or by any means, except with the prior written permission of, and with express attribution to POB. Copyright infringement is a violation of federal law subject to criminal and civil penalties. POB and the PREVENTION OF BLINDNESS SOCIETY OF METROPOLITAN WASHINGTON are registered service marks of the Prevention of Blindness Society of Metropolitan Washington.

The technical information contained herein is provided to Prevention of Blindness Society of Metropolitan Washington (POB) by members and nonmembers. While POB makes every effort to present accurate and reliable information on this Internet site, POB does not endorse, approve, or certify such information, nor does it guarantee the accuracy, completeness, efficacy, timeliness, or correct sequencing of such information. Use of such information is voluntary, and reliance on it should only be undertaken after an independent review of its accuracy, completeness, efficacy, and timeliness. Reference herein to any specific commercial product, process, or service by trade name, trademark, service mark, manufacturer, or otherwise does not constitute or imply endorsement, recommendation, or favoring by POB. POB (including its employees and agents) assumes no responsibility for consequences resulting from the use of information herein, (or from use of the information obtained from linked Internet addresses,) or in any respect for the content of such information, including (but not limited to) errors or omission, the accuracy or reasonableness of factual or scientific assumptions, studies or conclusion, the defamatory nature of statements, ownership of copyright or other intellectual property, privacy, or personal rights of others. POB is not responsible for, and expressly disclaims all liability for, damages of any kind arising out of use, reference to, or reliance on such information. No guarantees or warranties, including (but not limited to) any express or implied warranties of merchantability or fitness for a particular use or purpose, are made by POB with respect to such information.

Links to Other Sites
At certain places on this Prevention of Blindness Society of Metropolitan Washington Internet site, live "links" to other Internet addresses can be accessed. Such external Internet addresses contain information created, published, maintained, or otherwise posted by institutions or organizations independent of POB. POB does not endorse, approve, certify, or control these external Internet addresses and does not guarantee the accuracy, completeness, efficacy, timeliness, or correct sequencing of information located at such addresses. Use of any information obtained form such addresses is voluntary, and reliance on it should only be undertaken after an independent review of its accuracy, completeness, efficacy, and timeliness. Reference therein to any specific commercial product, process, or service by trade name, trademark, service mark, manufacturer, or otherwise does not constitute or imply endorsement, recommendation, or favoring by POB.