Portable camera reading systems

Lex Magnification and Performance

Magnification: 0.2 to 4x on a 22 inch screen
Time to read (approximate)
This depends on both the computer speed
and complexity of document:
Intel Atom (dual core): 15 seconds
Intel Core2Duo: 4 seconds
Intel Core i5: 2 seconds

Lex Documents

See the table below for information on the Lex document format (VisionAid Document format (VAD)) and supported import / export document types with the Lex software

Please note, for importing and export for documents other than image files or PDFs, Microsoft Office must be installed on the user's computer.

VisionAid Document Format: Size per page: 0.2 to 3 MB (typically 1MB per page)
Multi-page capture speed: Up to 20 pages per minute
Import formats supported: Adobe PDF, Image (BMP, JPEG, PNG, TIFF), MS Excel (XLS and XLSX), MS PowerPoint (PPT and PPTX), MS Word (DOC and DOCX), OpenDocument Formats (ODF), plain text (TXT), Rich Text Format (RTF)
Export formats supported: Adobe PDF, Image (BMP, JPEG, PNG, TIFF), Microsoft Word (DOC and DOCX), MP3, Open Document Format (ODF) plain text (TXT), Rich Text Format (RTF).

Lex Computer Requirements

Although Lex will function on any computer system 3 years old or newer, below is information on the minimum and recommended computer requirements.


Processor: Single core Intel Atom 1.6Ghz or equivalent
Operating System: Windows XP (32 bit only), Vista or 7 (32 or 64 bit)
RAM: XP 512MB, Vista 1.5GB, 7 - 1GB
HDD Space: Language dependent, minimum 400MB


Processor: Core2Duo 2.0 Ghz or faster
Operating System: Windows 7 (32 or 64 bit)
RAM: XP 1GB, Vista 2.0 GB, 7 - 2GB
HDD Space: 5 GB (to include document storage)