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. 2019 Apr 1;4(1):e000251. doi: 10.1136/bmjophth-2018-000251

Table 1.

Indications for subject exclusion from the analysis

Parameter Eyes (n)
Previous corneal surgery (PK, LVC, RK or PTK) 14
Other corneal disease (KCN, ectasia, PMD, corneal scars) 15
CDVA less than 6/12 23
No postoperative refraction 58
Incomplete biometry or out of range of any formula 27
Both eyes operated on (random exclusion) 419

KCN, keratoconus;LVC, laser vision correction;PK, penetrating keratoplasty;PMD, pellucid marginal degeneration; PTK, phototherapeutic keratectomy;RK, radial keratotomy.