My experience some years ago with Orion's brand name Kellner has convinced me not to purchase other eyepieces from them that carry their name. Again, quality of manufacture was the issue. For example, Tele Vue's 6-element Panoptic models provide a 68 degrees field with ghost images completely gone, generous eye relief, and only a trace of astigmatism even at the edge. The most popular are the Ultra Wide Angle models from Meade and Nagler and Nagler II series made by Tele Vue. All provide pinpoint stars virtually right to the edge of an amazing 82 degrees to 84 degrees field.
Many eyepieces offer multicoated optics.
However, the effectiveness of any coating depends on how well it is applied. An eyepiece with superb single-layer coatings can be better than an eyepiece with poor multicoatings. Indeed, with all of the elements some modern eyepiece have, multicoating is desirable. I have a beautiful Hastings triplet that has three cemented lenses with magnesium fluoride coatings on the air-exposed surfaces that offers brighter images than any Nagler of the same focal length. Some years ago, a manufacturer of binoculars found that their sales volume for one of their products increased after they had mistakenly undercoated the lenses for that model's run.