Keratoconus
https://openalex.org/C2778918178
https://www.wikidata.org/wiki/Q611984
Dioptre
https://openalex.org/C259533
https://www.wikidata.org/wiki/Q193933
Corneal collagen cross-linking
https://openalex.org/C2779247740
https://www.wikidata.org/wiki/Q3698646
Keratometer
https://openalex.org/C204442743
https://www.wikidata.org/wiki/Q1758711
Medicine
https://openalex.org/C71924100
https://www.wikidata.org/wiki/Q11190
Ophthalmology
https://openalex.org/C118487528
https://www.wikidata.org/wiki/Q161437
Corneal abrasion
https://openalex.org/C2779513239
https://www.wikidata.org/wiki/Q3510332
Riboflavin
https://openalex.org/C2776155809
https://www.wikidata.org/wiki/Q130365
Visual acuity
https://openalex.org/C2778257484
https://www.wikidata.org/wiki/Q555066
Cornea
https://openalex.org/C2776882836
https://www.wikidata.org/wiki/Q168291
Corneal topography
https://openalex.org/C2781053140
https://www.wikidata.org/wiki/Q3501232
Refractive error
https://openalex.org/C2781135284
https://www.wikidata.org/wiki/Q470427
Corneal pachymetry
https://openalex.org/C2776731418
https://www.wikidata.org/wiki/Q598876
Describing questionnaire design
All survey questions utilised a 5-point Likert scale.
[INST] Please produce a sentence from the paper. The sentence should not mention the title of the paper, rather it be extracted from the Describing Methods section of the paper.
Please provide one singular full sentence from the paper that serves the function provided, using the example as guidance. Be specific, using relevant terminology from the paper.
Refrain from vague or generic statements. Finally produce a search query in the form of a question targeted towards the knowledge contained therein. 
You must output json with the structure of {'Sentence': sentence, 'Query': query}.
Field: "Ophthalmology".
Paper: "Comparison of glaucomatous progression between untreated patients with normal-tension glaucoma and patients with therapeutically reduced intraocular pressures"
Function: "Describing questionnaire design".
Example Sentence: "All survey questions utilised a 5-point Likert scale.". [/INST]