Abstract: Provided herein is an ophthalmic composition. In some embodiments, the ophthalmic composition comprises a low concentration of an ophthalmic agent for treatment of presbyopia. Further disclosed herein is an ophthalmic composition including a low concentration of an ophthalmic agent and deuterated water.

Abstract: A direct memory access controller controls many direct memory access ports using a token passing scheme. The system multiplexes the port's accesses to external random access memory by daisy-chaining a loop of direct access memory ports and passing the token around to each port. Once a port receives the token it may request as many random access memory accesses as it requires. These accesses may be either read operations or write operations with both using the same multiplexed data bus. The latency inherent in reading an external RAM causes no loss in the access efficiency. When the port has completed its data transfer or if the port does not require a data transfer, the token is passed to the next direct memory access port for its data transfer. The token is passed around to all connected ports until all have had an opportunity to complete any memory transfers which they required. Each port is identical except for a binary identification code that is used to represent each port.

Abstract: A sliding window with big gap data compression system is simple to implement and gives good compression over a wide variety of bilevel images. A sliding window compressor with a very small window size is utilized in conjunction with a storage buffer which is large enough to hold at least an entire scan line of data symbols. Coupled to the storage buffer is circuitry that checks for a match between the incoming data symbol and a symbol stored in one specific programmable location. This programmable location is preferably exactly one scan line length away. Match locations are either within the range of the small window or exactly equal to the specific programmable location. The entire compressor can be viewed as a sliding window with a big gap (SWBG). This sliding window is of a length corresponding to the length of the scan line, comprised of the small window followed by a big gap and then the one specific programmable location, at the end of the scan line.

Abstract: A pet collar (10) includes a first web portion (18) attached to a second web portion (19) by a locking device (16). The locking device (16) includes opposed plates (22, 23) each of which have a plurality of apertures (27, 28, 29) therein which receive the web portions (18, 19). A lock barb (26) is positioned at each end of each plate (22, 23) and the lock barbs (26) of opposed plates (22, 23) are opposed to each other so that when tension is placed upon a web portion (18, 19), the opposed lock barbs (26) will engage the web portion (18, 19) positioned therebetween.

Abstract: A flow controller primarily for breathing gas analysis has a gas flow circuit leading from a breathing air inlet to a gas analyzer and to a vacuum source. Another gas is bled into the circuit between the breathing air inlet and a point upstream of the vacuum source. Such other gas is precluded from flowing upstream in the circuit toward the gas analyzer by making the intervening flow path or conduit of suitable dimensions to have a Peclet number at least equal to 4 and preferably greater than 4 and about 6.