Skip to main content
Cataract Star

Cataract Star

Independent UK cataract surgery PCR Risk Calculator

About this model

Prototype: Implements published rounded coefficients. Not CE or UKCA marked. Not a substitute for clinical judgement. Not affiliated with or endorsed by RCOphth, NOD, Medisoft or mediSIGHT.

Planned primary operating surgeon

This is the grade of the surgeon planned to perform the operation as primary operator — not simply the supervising consultant.

Operating surgeon grade (required)

Patient characteristics

No identifiable information is requested and none should be entered.

years
Sex category used by the source model (required)
Able to lie flat and cooperate (required)
Systemic diabetes mellitus (required)

Ocular and operative characteristics

First or second treated eye (required)
Previous intravitreal anti-VEGF therapy (required)
Pupil size (required)
mm

Accepted range 1.50–4.50 mm, two decimal places. Values outside this range are refused rather than substituted.

LogMAR

Accepted range -0.30–3.00, two decimal places. Use the best recorded preoperative distance visual acuity, corrected or uncorrected but not pinhole, recorded closest to surgery and within the preceding six months.

Input method

Enter the LogMAR value directly in the field above.

Ocular comorbidity and known risk factors

Each is an independent question. Absence is the reference category but must still be answered explicitly.

Amblyopia (required)
Brunescent, white or mature cataract (required)
Diabetic retinopathy (required)
Glaucoma (required)
High myopia (required)
Previous vitrectomy (required)
Pseudoexfoliation or phacodonesis (required)

Pseudoexfoliation and phacodonesis are one combined question because that is how the published model represents them.

Additional clinical factors not included in the numerical estimate

Optional. None of these fields change the calculated percentage. Selecting any of them raises a warning alongside the result.

Out-of-model factors (optional)

Optional free text, up to 1000 characters. Never enter a name, NHS number, hospital number, date of birth or address. This text does not affect the calculation.

Results

Complete every required field, then choose Calculate estimated risk. No result is produced until all required fields are answered and valid.

Prototype based on published RCOphth NOD coefficients. Not CE or UKCA marked. Not a substitute for clinical judgement. Not for use as the sole basis for patient counselling, treatment, surgeon allocation or governance decisions. Apply independent clinical judgement.