Fig. 2From: Prevalence of pectinate ligament dysplasia and associations with age, sex and intraocular pressure in the Basset hound, Flatcoated retriever and Dandie Dinmont terrierA series of gonioscopy photographs to illustrate the pectinate ligament dysplasia (PLD) grading system used. The grading system has been applied assuming the photographs are representative of the entire 360° of iridocorneal angle (ICA) in each case. a Normal appearance of the ICA and pectinate ligament. Unaffected (grade 0). b Approximately 15 % of the ICA is affected by abnormally thickened pectinate ligament fibres. Mildly affected (grade 1). c Approximately 25 % of the ICA is affected by pectinate ligament ‘sheeting’. Moderately affected (grade 2). d Approximately 75 % of the ICA is affected by pectinate ligament ‘sheeting’. Moderately affected (grade 2). e Over 90 % of the ICA is affected by ‘sheeting’. Severely affected (grade 3Back to article page