Sources & methodology
Specifications you can trace back to the source.
CLSpecs is an independent contact lens reference. It brings selected U.S. manufacturer specifications into a searchable library while preserving the context, restrictions and uncertainty behind each record.
What the catalog covers
The current catalog contains 41 selected lens records from four manufacturers. It includes spherical, toric, multifocal and multifocal toric designs, with daily, two-weekly and monthly replacement schedules represented. This is not an exhaustive U.S. market inventory, a live stock feed or a price comparison service.
Source review for this catalog edition: . Individual records show the source access date and document revision, when available. Manufacturer information can change after review.
How a source becomes a lens record
Identify the product and its U.S. sources
Records cite official manufacturer product pages, reference guides or package inserts. A source includes its title, URL, access date, relevant page or table location, supported fields and document revision when available. Review the original source when a detail matters to your decision.
Keep dependent parameters together
Published parameter blocks become complete combinations of sphere, cylinder, axis, add, base curve and diameter within a named lens variant. Search checks those combinations. It does not mix values from different variants or infer that every value in a lens-level summary can be combined.
Preserve labels, measurements and limits
Manufacturer add categories keep their original labels. Dk and Dk/t remain separate properties, accompanied by the measurement context supplied by the source. A value that is not documented stays unknown; it is not calculated from an unrelated specification.
Make the evidence visible
Each lens page includes parameter restrictions, source notes and links to the original documents. Comparison and Ask answers use the same catalog. “Complete” describes the transcribed parameter grid for that record, not a manufacturer’s entire portfolio.
A missing match can mean different things.
Listed together
All requested parameters occur together in one documented combination. This confirms a match in the reviewed source grid, not availability from a retailer or a clinical fit.
Not listed together
The record’s documented grid does not contain that combination. Individually listed values can still fail this check because powers, cylinders, axes or lens variants depend on one another.
Source coverage incomplete
The evidence does not support a definite answer. A missing match in a partial record is not treated as proof that the manufacturer does not offer it. See Biotrue ONEday for a record with incomplete parameter coverage.
Not applicable
Some parameters do not apply to a lens design. For example, a spherical record has no cylinder or applicable axis. Absence is kept distinct from a supplied power or manufacturer add category.
Parameter filters include confirmed matches only. Open individual records or Ask CLSpecs to inspect uncertainty and source notes.
What the lookup tools do
Ask CLSpecs currently offers catalog-mode answers to lens facts, comparisons and parameter questions, with source links. Its read-only MCP connection exposes the same catalog and combination checks to compatible assistants. Neither tool establishes clinical interchangeability.
Smart Rx paste parses values in the browser tab. Applied Rx values stay out of the page URL and are cleared on reload. Optional vertex conversion uses an adjustable distance, starts at 12 mm and shows calculated powers separately from rounded filter targets. It is an estimate for looking up specifications, not a contact lens prescription.
Dictation depends on browser support and microphone permission. The browser’s speech provider may process audio. Review dictated text before searching or asking, and keep patient identifiers out of pasted values and questions.
An independent reference
CLSpecs is not affiliated with or endorsed by Alcon, Bausch + Lomb, CooperVision, ACUVUE or ODspecs. Product and manufacturer names identify the records and their sources. Manufacturer documentation remains the primary reference for the published specifications.
For an example of checking a restricted parameter grid, open DAILIES TOTAL1 for Astigmatism. To see how the library fits a manufacturer-table workflow, read CLSpecs as an ODspecs alternative.