User Group for Laser Interference Biometry

ULIB - the User Group for Laser Interference Biometry - has emerged from EULIB - the European User Group for Laser Interference Biometry - on the occasion of the 2001 meeting of the American Society of Cataract and Refractive Surgery (ASCRS) in San Diego, CA, USA, April 28 - May 02, 2001. By changing our name we are paying tribute to the fact that our group has grown over its European birthplace and has evolved into a global community with colleagues from all over the world. EULIB has been founded in October 1999 as an independent interest group of scientists and users, working in the field of optical biometry or applying this technique or simply being interested in this fascinating new method and its potential benefits.

ULIB is intended to serve as a platform to exchange information, news, ideas, results, FAQs etc related to optical biometry and its clinical applications.The group is open to everyone sharing the same background and interests. One of ULIB's special concerns is the optimization of lens constants for the calculation of intraocular implant lenses. Due to the fact that - out of a number of reasons - an optically measured axial length is different from the measurement result obtained with ultrasound, IOL constants like e.g. the A constant or ACD constant etc. will in general fail to give good results when used in optical biometry. Therefore, an individual optimization for a given intraocular lens type is necessary. This can be done on the basis of pre- and postop clinical data. A spreadsheet form in MS Excel format which can be downloaded from this site has been designed to accept this data. The results obtained from processing this data are published thus providing maximum benefit to all ULIB members.

Zeiss Optical Biometry (IOLMaster , optimized IOL constants, ACMaster)
Haag-Streit Optical Biometry (Lenstar LS 900 , optimized IOL constants)
Nidek Optical Biometry (AL-Scan , optimized IOL constants)
Topcon Optical Biometry (Aladdin , optimized IOL constants)
Oculus Optical Biometry (Pentacam AXL( , optimized IOL constants)
ULIB Mailing List
LIB links (internet resources related to optical biometry)
Calculation of corneal power

This site is designed, edited and maintained by Wolfgang Haigis PhD, Inst. for Ophthalmic Biometry, Wuerzburg, Germany. Comments and critics are welcome.

Last Revision: Jul 12, 2016 WH